CN109681638B

CN109681638B - Medium-small diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring and manufacturing method thereof

Info

Publication number: CN109681638B
Application number: CN201910066951.1A
Authority: CN
Inventors: 喻拯昊; 喻思纯
Original assignee: Wuhan Xinhuafeng Machinery Manufacturing Co ltd
Current assignee: Wuhan Xinhuafeng Machinery Manufacturing Co ltd
Priority date: 2018-12-10
Filing date: 2019-01-18
Publication date: 2020-10-09
Anticipated expiration: 2039-01-18
Also published as: CN109323000A; CN109681638A

Abstract

The invention provides a middle-small-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring which comprises a plastic ring body, wherein an iron sheet ring is arranged on the plastic ring body, and wear-resistant material layers are sprayed on the surfaces of a first supporting part and a second supporting part of the iron sheet ring to form a first bright-band ring surface and a second bright-band ring surface; grinding and polishing the first bright band ring surface and the second bright band ring surface of the iron leather ring; manufacturing a plastic ring body mold according to the manufactured iron leather ring, and pouring the modified PPS plastic into the plastic ring body mold for injection molding to form a plastic ring body; and (3) coating sealant on the contact surface of the iron sheet ring and the plastic ring body, and inserting the inserted pin of the iron sheet ring into the slot of the plastic ring body as shown in the figure 6, so that the iron sheet ring and the plastic ring body are tightly connected to finish the manufacture of the floating oil seal ring. The iron-plastic floating seal ring manufactured by the novel spraying process and the novel super-wear-resistant material has high quality and wear resistance; the iron-plastic bonding material has low cost and huge market competitiveness.

Description

Medium-small diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring and manufacturing method thereof

Technical Field

The invention relates to the field of machinery, in particular to a medium and small diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring and a manufacturing method thereof.

Background

The core point of the quality of the metal ring of the floating oil seal lies in the quality of the sealing performance of a bright band on a working surface, and the wear-resistant service life is embodied. According to the size of the iron ring, the width of the bright band of the working surface of the iron ring is limited by 3-5 mm. If the bright band is too wide, the adsorption force of the binding surface of the two rings is too large, the binding is too dead, lubricating oil cannot seep into the binding surface, the two iron rings are locked easily, the rubber ring slips and rotates, the rubber ring is worn quickly in rotation, and oil leaks immediately; meanwhile, after the abrasion loss of the bright band of the working surface of the floating oil seal iron ring reaches 2mm, the pair of friction pairs lose the height of 4 mm. This is filled by the resilient force of the rubber ring. The rebound of the rubber ring above 4mm is not compensated by the general situation. In this case, the rubber ring does not lose the original resilience force even though the rubber ring is not aged, but the rubber ring is not worried. And in any case, the wear-resistant iron ring is longer, the rubber ring works for a longer time, the aging stiffness is severe, and no resilience force is generated to make up a loose gap caused by the abrasion of the iron ring. The working bright band surfaces of the two iron rings are not tightly jointed, or the jointing surfaces are loosened, the gap is enlarged, oil leakage occurs, the sealing is failed, and the machine must be stopped for replacement. The iron ring and the rubber ring form two-stage sealing, and any one of the two sealing is invalid, so that oil leakage occurs and replacement is needed. The service lives of the rubber ring, the iron ring and the like are the most economical and scientific optimization choices. From this it follows: the thickness of the wear-resistant layer of the all-metal floating seal iron ring is not more than 3mm, which is enough and is also economically suitable. The wear-resistant layer is thicker, which is redundant waste. If the super wear-resistant material is used, the time required for 2mm wear is longer, and the rubber ring is aged and hardened to lose effectiveness due to the fact that the rubber ring cannot work for a super long time.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a medium-small diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring and a manufacturing method thereof, wherein a spraying technology is ingeniously applied to spray super-wear-resistant materials on the end face of an iron sheet ring. The quality problem of abrasion resistance is solved, so that the iron leather ring and the plastic ring can be skillfully combined to replace the traditional metal floating seal ring.

The technical scheme of the invention is as follows:

the utility model provides a middle and small diameter iron-plastic combined super wear-resisting high strength oil seal ring that floats which characterized in that: the lubricating oil lubricating device comprises a plastic ring body, wherein an iron sheet ring is arranged on the plastic ring body, a mounting groove for mounting the iron sheet ring is formed in the part, close to the working surface, of the upper surface of the plastic ring body, a first connecting surface, a second connecting surface and a third connecting surface are sequentially arranged on the working surface of the plastic ring body from top to bottom, a slot extending from the working surface to the inside of the plastic ring body is formed in the bottom of the third connecting surface, an oil inlet inclined surface facilitating the entry of lubricating oil is formed below the slot, the iron sheet ring comprises an upper covering edge placed in the mounting groove, a first supporting part, a first slope connecting part, a second supporting part, a second slope connecting part and a bolt inserted into the slot are sequentially arranged on the working surface of the iron sheet ring body corresponding to the plastic ring body, the lower end of the upper covering edge is connected with the upper end of the first supporting part, and the lower end of the first, the outer end of bolt is connected through second slope connecting portion to the lower extreme of second supporting part, the surface spraying of first supporting part has the wearing material layer to form first bright band anchor ring, the surface spraying of second supporting part has the wearing material layer to form second bright band anchor ring. When the wear-resistant layer of the first bright band ring surface is worn out, the second bright band ring surfaces of the two rings are pushed out to be working surfaces, and smooth natural transition is carried out to replace oil sealing work.

The thickness of the first bright band ring surface and the second bright band ring surface is 0.3-0.4 mm. The thickness of the super wear-resistant layer can be one hundred even though the super wear-resistant layer is thin.

The thickness of the iron sheet ring is 1mm-1.5 mm.

The height difference between the first bright band ring surface and the second bright band ring surface is 0.4mm-0.5 mm.

And sealant is filled between the contact parts of the plastic ring body and the iron leather ring so that the plastic ring body and the iron leather ring are tightly connected.

A manufacturing method of a middle and small diameter iron-plastic combined super wear-resistant high-strength floating oil seal ring comprises the following specific steps,

heating the long iron sheet and performing rough rolling processing on the surfaces of the first supporting part and the second supporting part;

step two, performing flat surface rounding processing on the heated and rough-rolled iron sheet when the iron sheet is hot, and welding ports to form a flat iron sheet ring (shaped like a flat gasket);

thirdly, the rough surface is used as the outer end surface of the working bright band, the flat iron leather ring is punched and formed by a punching process, and an upper wrapping edge, a first supporting part, a first slope connecting part, a second supporting part, a second slope connecting part and a bolt are folded, so that the flatness of the two working bright band ring surfaces is especially ensured, and the ellipticity reaches the quality standard value;

spraying wear-resistant material layers on the clean surfaces of the first supporting part and the second supporting part of the iron leather ring to form a first bright-band wear-resistant ring surface and a second bright-band wear-resistant ring surface;

grinding and polishing the first bright band ring surface and the second bright band ring surface of the iron leather ring;

sixthly, manufacturing a plastic ring body mold according to the manufactured iron leather ring, and pouring the modified PPS plastic into the plastic ring body mold for injection molding to form a plastic ring body;

and step seven, coating sealant on the contact surface of the iron leather ring and the plastic ring body, and inserting the plug into the slot, so that the iron leather ring and the plastic ring body are tightly connected to finish the manufacturing of the floating oil seal ring.

Compared with the prior art, the invention has the beneficial effects that: firstly, a new spraying process is applied, and an iron-plastic floating seal ring manufactured by a new super-wear-resistant material is high in quality, wear-resistant and strong in performance; secondly, the cost of the iron-plastic bonding material is low, although the price of the super wear-resistant metal powder is high, the super wear-resistant metal powder is thin and has a thickness of 0.3-0.4mm, for example 0730, a pair of sprayed consumed powder is only about 10 g, and the iron-plastic bonding material has huge market competitiveness; the novel material is energy-saving and environment-friendly, the process is scientific and unique, and the production efficiency is high; accords with the national industrial support policy of energy conservation and environmental protection and is harmoniously developed with the society.

Drawings

FIG. 1 is a schematic view of a floating oil seal ring according to the present invention

FIG. 2 is a schematic view of the plastic ring structure of the present invention;

FIG. 3 is a schematic structural view of an uncoated wear-resistant layer of the bright band of the iron sheet ring of the present invention;

FIG. 4 is a schematic view of a bright band structure of the iron leather ring after being sprayed with the wear-resistant material;

FIG. 5 is a schematic view of a pair of floating seal rings in a bonded state according to the present invention.

The reference numbers in the figures denote: 1-plastic ring body, 2-iron sheet ring, 11-mounting groove, 12-first connecting surface, 13-second connecting surface, 14-third connecting surface, 15-slot, 20-upper edge covering, 21-first supporting part, 22-first slope connecting part, 23-second supporting part, 24-second slope connecting part, 25-bolt, 26-first bright band and 27-second bright band.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution:

the utility model provides a super wear-resisting high strength oil seal ring of combination is moulded to middle and small diameter iron, includes plastics ring body 1, install iron leather ring 2 on the plastics ring body 1, the mounting groove 11 that is used for installing iron leather ring 2 is offered to the part that the upper surface of plastics ring body 1 is close to the working face, the working face of plastics ring body 1 has set gradually first connection face 12, second connection face 13 and third connection face 14 from the top down, the slot 15 of extending to plastics ring body 1 inside by the working face is offered to the bottom of third connection face 14, the oil feed inclined plane 16 that makes things convenient for lubricating oil to get into is seted up to the below of slot 15, iron leather ring 2 is including laying the last bordure 20 in mounting groove 11, the working face that iron leather ring 2 corresponds plastics ring body 1 has set gradually first supporting part 21, first slope connecting portion 22, second supporting part 23, second slope connecting portion 24 and the bolt 25 that inserts in slot 15, go up the lower extreme of borduring 20 and the upper end of first supporting part 21 and link to each other, the lower extreme of first supporting part 21 passes through the upper end that first slope connecting portion 22 connects second supporting part 23, and the lower extreme of second supporting part 23 passes through the outer end of second slope connecting portion 24 connecting bolt 25, the surface spraying of first supporting part 21 has wear-resistant material layer to form first bright-band anchor ring 26, the surface spraying of second supporting part 23 has wear-resistant material layer to form second bright-band anchor ring 27.

The thickness of the wear-resistant material layer on the outer end surfaces of the first bright band ring surface 26 and the second bright band ring surface 27 is 0.3-0.4 mm.

The thickness of the iron sheet ring 2 is 1mm-1.5 mm.

The height difference of the outer end surface planes of the first bright band ring surface 26 and the second bright band ring surface 27 is 0.3mm-0.5 mm.

And sealant is filled between the contact parts of the plastic ring body 1 and the iron sheet ring 2 to ensure that the two parts are tightly connected.

step one, heating a straight long iron sheet strip and carrying out rough rolling processing on a first supporting part 21 and a second supporting part 23;

step two, performing flat surface rounding processing on the heated and rough-rolled iron sheet and welding a port to form a flat iron sheet ring 2; (as flat gasket ring)

Thirdly, a model stamping process is selected to stamp the flat ring iron sheet into a covered edge 20, a first supporting part 21, a first slope connecting part 22, a second supporting part 23, a second slope connecting part 24 and a bolt 25;

step four, spraying wear-resistant material layers on the surfaces of the first supporting part 21 and the second supporting part 23 of the iron sheet ring 2 to form a first bright-band ring surface 26 and a second bright-band ring surface 27;

step five, grinding and polishing the first bright band ring surface 26 and the second bright band ring surface 27 of the iron leather ring 2;

sixthly, manufacturing a plastic ring body mold according to the manufactured iron leather ring 2, and pouring the modified PPS plastic into the plastic ring body mold for injection molding to form a plastic ring body 1;

and step seven, coating sealant on the contact surface of the iron leather ring 2 and the plastic ring body 1, and inserting the plug pin 25 into the slot 15, so that the iron leather ring 2 and the plastic ring body 1 are tightly connected to finish the manufacturing of the floating oil seal ring.

The iron sheet ring solves the problem that the floating seal ring must have a sealing bright belt surface, and must be a metal ring because plasma arc spraying and flame spraying ultra-wear-resistant metal powder or non-metal materials must adhere to a clean steel metal surface. Meanwhile, the working sealing end face of the floating seal ring needs to bear certain axial pressure. The iron sheet ring needs to have certain steel strength. The design of the corners with multiple folds such as double bright bands and the like on the large end surface plane of the iron sheet ring can effectively enhance the function of resisting axial and radial compressive deformation of the sheet iron. In addition, the back of the large end of the iron sheet ring is also provided with a plastic ring for supporting and propping, so that the rigidity strength of the iron-plastic combined floating seal iron sheet ring is free from worry. The full metal ring function can be completely replaced. If the coating material is non-metal, the iron sheet ring can be omitted if the coating material can be directly adhered to the plastic body and integrated into a working end face.

The modified engineering plastic ring is made of selected materials, has certain toughness (the toughness is equivalent to that of a cast iron ring) as long as the modified engineering plastic ring can adapt to the working condition as long as the modified engineering plastic ring is the same as a rubber sealing ring assembled on a floating seal ring, can resist high and low temperatures (between minus 30 ℃ and plus 120 ℃) and has the same temperature resistance as the assembled rubber ring, and can replace the ring body of the original steel. The combination not only enhances the strength of the iron sheet ring, but also plays a role in realizing the second-stage sealing together with the rubber ring. The floating seal ring is a two-stage seal, one stage is a seal position formed by mutually attaching bright bands on the large end faces of a pair of iron rings, the other stage is a rubber ring sleeved on the outer ring of the iron ring, the inner diameter of the rubber ring is tightly attached to the outer circular surface part of the floating seal iron ring, so that lubricating oil can be drilled from the part in a seamless manner, the outer circular diameter of the rubber ring is elastically deformed and tightly attached to the inner diameter wall surface of a seat cavity due to axial pressure after being installed in the seat cavity, so that the lubricating oil cannot leak and spill from the part, the one-stage seal of the rubber ring is just one-stage seal by clamping the elastic force of rubber between an inner iron ring surface and an outer seat cavity wall, and two surfaces are tightly attached to realize the oil sealing function, after the floating seal ring is installed, the rubber ring is extruded by the iron ring and the seat cavity, so that the generated elastic resilience force is tightly attached to seal the two surfaces, thus forming an important one-stage of the sealing function in practice, the floating oil seal design is not pressed more tightly and pressed better, but is fit moderately. Because the resilience force of the rubber ring is transmitted to the end face of the iron ring, the working bright band faces of the 2 iron rings are tightly attached, and because the oil is sealed in the movable state, an oil film needs to permeate on the bright band of the attachment end face of the 2 iron rings. Only then is it possible to rotate and seal the oil, which requires a moderate elasticity of the rubber ring to give the right force. Therefore, the binding surface of the bright band of the iron ring is properly stressed, an oil film is formed, the abrasion force is small, and the service life of the iron ring can be prolonged. Otherwise, the pressing is too tight, an oil film cannot be formed, and the binding surfaces of the two iron rings are dry-ground and damaged quickly. Certainly, the external pressure is too large, the internal pressure and the external pressure of the seat cavity are unbalanced, backflow can be caused, the backflow is caused by special working condition environments, the design is required in a targeted mode, and pressure parameters are considered separately. The floating oil seal is called as floating, namely the rubber ring is pressed by the two seat cavities, and the two iron rings are pressed and attached together by the two rubber rings. The iron rings are attached together one by one, and no fixing piece is used for fixing the iron rings, so that the iron rings are suspended in the middle. And the combination of one of the seat cavities, the rubber ring and the iron ring can also rotate along with the machine. By means of the elasticity of the rubber rings at the two ends, when the combination of the seat cavity, the rubber ring and the iron ring on the side of the driving wheel rotates, the iron ring slightly jumps along with the elasticity due to the elastic change of the rubber rings, and the pair of iron rings seem to be 'suspended' and can rotate and seal oil.

The novel floating oil seal ingeniously applies a spraying technology to spray super-wear-resistant materials to the end face of the iron sheet ring. The quality problem of abrasion resistance is solved, so that the iron leather ring and the plastic ring can be skillfully combined to replace the traditional metal floating seal ring. Compared with the traditional metal floating seal ring, the novel iron-plastic combined floating oil seal ring which is unique in original creation has four advantages: 1. energy conservation and environmental protection; 2. the technology is advanced, and the production efficiency is high; 3. the digitalization and automation degree is high; 4. high quality, low cost and high performance-price ratio. Therefore, the method has strong market competitiveness.

The energy-saving environment-friendly energy-. Following the direction of the national new industrial environmental protection policy, the traditional old manufacturing industry realizes upgrading and updating and glows new industrial appearance harmonious with the society and green and harmonious.

The quality is excellent and the price is cheap, the most suitable material is selected and used, the advanced processing technology and equipment are scientifically optimized, the digitization and the automation degree are high, the production efficiency is improved, the product quality is improved, the labor cost is reduced, and the market competitiveness is directly converted.

The technology is advanced, the product quality is good, and the production efficiency is high; due to the unique and original novel design, a new technical material is selected at first, so that the problem that the product quality is better is solved; secondly, the material is cheaper; and thirdly, a new device is designed for processing, automation and high digitization degree are achieved, the product quality is guaranteed to be excellent and stable, the efficiency is greatly improved, the passive situation that labor is intensive, the efficiency is low, the labor cost of 'half and half' of work materials is high, and the market competitiveness is lost is changed.

Digitalization, degree of automation is high: compared with the original floating oil seal iron ring processing technology and equipment, the novel iron-plastic combined floating oil seal ring processing technology is completed by novel equipment. All the novel devices are manufactured by following the modern, digital and automatic pace design concept. The most outstanding advantages are high and stable quality of processed products, high efficiency, high yield, low cost, energy conservation, environmental protection, and brand new appearance of enterprises, and creates infinite possibility for realizing black light factories.

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

Claims

1. The utility model provides a middle and small diameter iron-plastic combined super wear-resisting high strength oil seal ring that floats which characterized in that: including plastics ring body (1), install iron leather ring (2) on plastics ring body (1), mounting groove (11) that are used for installing iron leather ring (2) are offered to the part that the upper surface of plastics ring body (1) is close to the working face, the working face of plastics ring body (1) has set gradually first connection face (12), second connection face (13) and third connection face (14) by last under to, slot (15) of extending to plastics ring body (1) by the working face are seted up to the bottom of third connection face (14), oil feed inclined plane (16) that make things convenient for lubricating oil to get into are seted up to the below of slot (15), iron leather ring (2) are including laying last bordure (20) in mounting groove (11), the working face that iron leather ring (2) correspond plastics ring body (1) has set gradually first supporting part (21), first slope connecting portion (22), The lower end of the upper edge covering (20) is connected with the upper end of the first supporting part (21), the lower end of the first supporting part (21) is connected with the upper end of the second supporting part (23) through the first slope connecting part (22), the lower end of the second supporting part (23) is connected with the outer end of the bolt (25) through the second slope connecting part (24), a wear-resistant material layer is sprayed on the outer surface of the first supporting part (21) to form a first bright band ring surface (26), and a wear-resistant material layer is sprayed on the outer surface of the second supporting part (23) to form a second bright band ring surface (27);

and sealant is smeared between the contact parts of the plastic ring body (1) and the iron sheet ring (2) to ensure that the plastic ring body and the iron sheet ring are tightly connected.

2. The middle and small diameter iron-plastic combined super wear-resistant high strength floating oil seal ring according to claim 1, characterized in that: the thickness of the wear-resistant material spraying layer of the first bright-band ring surface (26) and the second bright-band ring surface (27) is 0.3-0.4 mm.

3. The middle and small diameter iron-plastic combined super wear-resistant high strength floating oil seal ring according to claim 1, characterized in that: the thickness of the iron sheet ring (2) is 1mm-1.5 mm.

4. The middle and small diameter iron-plastic combined super wear-resistant high strength floating oil seal ring according to claim 1, characterized in that: the height difference between the first bright band ring surface (26) and the second bright band ring surface (27) is 0.3mm-0.5 mm.

5. A manufacturing method of a medium and small diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring is characterized by comprising the following steps: comprises the following specific steps of the following steps,

firstly, performing plane folding and rounding processing on the heated and rough-rolled iron sheet and welding a port to form a flat iron sheet ring (2);

punching the flat iron leather ring (2) by adopting a die punching process, folding an upper wrapping edge (20), a first supporting part (21), a first slope connecting part (22), a second supporting part (23), a second slope connecting part (24) and a bolt (25), and ensuring the flatness of 2 bright band ring surfaces on the end surface, wherein the outer end surface is a rough surface;

thirdly, spraying wear-resistant material layers on the rolled outer end surfaces of the first supporting part (21) and the second supporting part (23) of the iron sheet ring (2) and the clean surfaces to form a first bright band ring surface (26) and a second bright band ring surface (27);

grinding and polishing the first bright band ring surface (26) and the second bright band ring surface (27) of the iron leather ring (2) to ensure that the flatness and the smoothness of the bright band ring surface of the working surface of the iron leather ring reach the quality standard;

fifthly, manufacturing a plastic ring body mold according to the manufactured iron leather ring (2), and pouring the modified PPS plastic into the plastic ring body mold to form a plastic ring body (1) by injection molding;

and sixthly, coating sealant on the contact surface of the iron leather ring (2) and the plastic ring body (1), and inserting the plug pin (25) into the slot (15), so that the iron leather ring (2) and the plastic ring body (1) are tightly connected to finish the manufacturing of the floating oil seal ring.