CN109578582B - Large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring and manufacturing method thereof - Google Patents

Abstract

The invention provides a large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring.A plastic ring body is provided with an iron sheet ring, 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 working ring surface and a second bright band working ring surface; a sliding stop pin is additionally welded in a right-angle frame formed by the third supporting part of the iron sheet ring and the lower wrapping edge; grinding and polishing the first bright band and the second bright band 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 coating sealant on the contact surface of the iron leather ring and the plastic ring body, and inserting the anti-slip pin 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. The iron-plastic floating seal ring manufactured by the novel spraying process and the novel super-wear-resistant material has high quality, wear resistance and strong performance; the iron-plastic bonding material has low cost and huge market competitiveness.

Description

Large-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 large-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 two iron rings are not tightly jointed, the jointing surface is 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 coating does not exceed 3mm and is sufficient and 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 also stiff due to the fact that the rubber ring cannot be decocted for too long time, and is aged and invalid.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring and a manufacturing method thereof, wherein a spraying technology is skillfully 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. Due to the unique and original double bright band working surface design, after the wear of the bright band wear-resistant layer of the first working surface is exhausted, the first working surface can be transited to the second working bright band wear-resistant ring surface of the next layer in a smooth manner, and the oil sealing operation is continued. And the novel floating seal ring has twice ultra-long service life. The super wear-resistant material is selected, so that the wear-resistant service life is greatly prolonged, and the service life of the novel floating seal ring is doubled by the aid of the working surface of the double bright bands. The floating seal ring has the advantages of being superior to the traditional all-metal floating seal ring in quality and service life, and being lower in manufacturing cost and stronger in market competitiveness.

The technical scheme of the invention is as follows:

a large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring comprises a plastic ring body, wherein an iron sheet ring is installed on the plastic ring body, a mounting groove for installing the iron sheet ring is formed in a part, close to a 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 position, close to the lower surface of the plastic ring body, of the bottom of the third connecting surface, the iron sheet ring comprises an upper wrapping edge placed in the mounting groove, a first supporting portion, a first slope connecting portion, a second supporting portion, a second slope connecting portion, a third supporting portion and a lower wrapping edge are sequentially arranged on the working surface of the iron sheet ring corresponding to the plastic ring body, one end, close to the working surface, of the upper wrapping edge is connected with the upper end of the, the lower extreme of second supporting part passes through the upper end that second slope connecting portion connected the third supporting part, and bordure the one end that is close to the working face under the lower extreme of third supporting part is connected, 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, be provided with the non-slip pin that is used for inserting in the slot in the third supporting part and the right angle frame of borduring formation down.

The thickness of the super wear-resistant coating sprayed on the first bright band ring surface and the second bright band ring surface is 0.3-0.4 mm.

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

The plane height difference of the end surfaces of 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 large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring comprises the following specific steps,

step one, performing flat surface rounding processing on the heated straight iron sheet subjected to rough rolling processing, and welding an end port to form a flat iron sheet ring (the end surface is like a flat gasket ring);

secondly, stamping a first supporting part, a first slope connecting part, a second supporting part, a second slope connecting part, a third supporting part and a lower wrapping edge on the flat round iron sheet ring by adopting a die stamping process, wherein the outer end surface is a rough surface;

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

welding a non-slip pin in a right-angle frame formed by the third supporting part of the iron leather ring and the lower wrapping edge;

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 same specification and model of the manufactured iron sheet ring, and pouring the modified PPS plastic into the plastic ring body mold to form a plastic ring body by injection molding;

and step seven, coating sealant on the contact surface of the iron leather ring and the plastic ring body, and inserting the anti-slip pin 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 novel super-wear-resistant material is high in quality and wear resistance, and the service life is prolonged exponentially due to the unique and original double-working-surface bright band design; 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 the iron sheet ring bright band of the present invention before being sprayed with super-abrasion-resistant material;

FIG. 4 is a schematic structural view of the bright band surface of the iron leather ring coated with super-wear-resistant material;

fig. 5 is a schematic diagram of the use state of the finished product of the invention.

The reference numbers in the figures denote: the plastic ring comprises a plastic ring body 1, an iron sheet ring 2, a mounting groove 11, a first connecting surface 12, a second connecting surface 13, a third connecting surface 14, a slot 15, an upper covering edge 20, a first supporting part 21, a first slope connecting part 22, a second supporting part 23, a second slope connecting part 24, a third supporting part 25, a lower covering edge 26, a slip-preventing pin 27, a first bright band ring surface 28 and a second bright band ring surface 29.

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 major diameter iron, includes plastic ring body 1, install iron leather ring 2 on the plastic 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 plastic ring body 1 is close to the working face, the working face of plastic ring body 1 has set gradually first connection face 12, second connection face 13 and third connection face 14 from the top down, the bottom of third connection face 14 is close to plastic ring body 1 lower surface department and has seted up the slot 15 of extending to plastic ring body 1 inside by the working face, iron leather ring 2 is including laying the last bordure 20 in mounting groove 11, iron leather ring 2 corresponds the working face of plastic ring body 1 and has set gradually first supporting part 21, first slope connecting portion 22, second supporting part 23, second slope connecting portion 24, third supporting part 25 and bordure 26 down, the one end that goes up bordure 20 and is close to the working face links to each other with the upper end of first supporting part, 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 upper end that second slope connecting portion 24 connects third supporting part 25, and the lower extreme of third supporting part 25 is connected down and is bordured 26 one end that is close to the working face, the surface spraying of first supporting part 21 has wear-resistant material layer to form first bright band anchor ring 28, the surface spraying of second supporting part 23 has wear-resistant material layer to form second bright band anchor ring 29, be provided with the limited slip round pin 27 that is used for inserting in the plastics ring slot 15 in the right angle frame that third supporting part 25 and bordure 26 down formed.

The thickness of the first bright-band ring surface 28 and the second bright-band ring surface 29 is 0.3-0.4 mm.

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

The plane height difference of the end surfaces of the first bright band ring surface 28 and the second bright band ring surface 29 is 0.4mm-0.5 mm.

And sealant is smeared between the contact parts of the plastic ring body 1 and the iron sheet ring 2 so that the plastic ring body and the iron sheet ring are tightly jointed and connected.

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

step one, a long-strip iron sheet is selected to be heated and is subjected to rough rolling processing, the iron sheet is subjected to flat round folding processing while the iron sheet is hot, and an end opening is welded to form an iron sheet ring 2 in the shape of a flat gasket ring;

secondly, stamping a first supporting part 21, a first slope connecting part 22, a second supporting part 23, a second slope connecting part 24, a third supporting part 25 and a lower edge covering 26 from the flat ring by adopting a die stamping process;

step three, spraying wear-resistant material layers on the clean rough surface surfaces of the outer end 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 28 and a second bright band ring surface 29;

fourthly, welding a sliding stop pin 27 in a right-angle frame formed by a third supporting part 25 of the iron sheet ring 2 and the lower edge cover 26;

step five, grinding and polishing the first bright band ring surface 28 and the second bright band ring surface 29 of the iron leather ring 2;

sixthly, manufacturing a plastic ring body mold according to the corresponding specification and model of 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 step seven, coating sealant on the contact surface of the iron sheet ring 2 and the plastic ring body 1, and inserting the anti-slip pin 27 into the plastic ring body slot 15, so that the iron sheet 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 axial and radial compression deformation resistance of the iron sheet. 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.

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 be leaked 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 in a gap between the two surfaces to realize the oil sealing function, the rubber ring is extruded by the iron ring and the seat cavity to deform, so that the elastic resilience force generated by the deformation is tightly attached to the two surfaces to form the oil sealing, which is an important one-stage of the sealing function, in practice, the floating seal design is, but rather to be reasonably conformable. Because the resilience force of the rubber ring is transmitted to the working bright band surface of the end surface of the iron ring to be tightly attached, the end surface of the iron ring needs to be penetrated by an oil film because the oil is sealed in a movable state. The rubber ring can move and seal oil, and the proper elasticity of the rubber ring is required to give force. Therefore, the binding surface of the bright band of the iron ring is properly stressed and is formed by an oil film, the abrasion force is small, and the service life is long. 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. Of course, the external pressure is too large, the internal pressure and the external pressure of the seat cavity are not balanced, backflow can be caused, the requirement is a special working condition, and pressure parameters need to be designed in a targeted manner. 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. At the moment, the working bright band surfaces of the large end surfaces of the two iron rings are bonded one by one, and the bonding surfaces must be lubricated by an oil film formed by lubricating oil, so that oil leakage and dry grinding are avoided, no fixing piece is used for fixing the iron rings, and 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 floating seal seat cavity, the rubber ring and the floating seal ring are installed and combined into a whole, and the three are not allowed to move mutually and only can move together. The end surfaces of the two assemblies are oppositely attached and installed to form a pair of friction pairs, and the rubbed end surfaces are the working bright band surfaces of 2 iron sheet rings.

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 unique and original novel design, a new technology, a new material and a new process are selected, so that the problems of better product quality and environmental protection are 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 (6)

1. The utility model provides a super wear-resisting high strength oil seal ring that floats of major diameter iron-plastic combination 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, the bottom that third connection face (14) is close to plastics ring body (1) lower surface department and has seted up slot (15) by the working face to the inside extension of plastics ring body (1), iron leather ring (2) are including laying borduring (20) on 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), A second slope connecting part (24), a third supporting part (25) and a lower binding edge (26), one end of the upper edge covering (20) close to the working surface 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 a first slope connecting part (22), the lower end of the second supporting part (23) is connected with the upper end of the third supporting part (25) through a second slope connecting part (24), the lower end of the third supporting part (25) is connected with one end of the lower edge covering (26) close to the working surface, the outer surface of the first supporting part (21) is sprayed with a wear-resistant material layer to form a first bright-belt ring surface (28), the outer surface of the second supporting part (23) is sprayed with a wear-resistant material layer to form a second bright-belt ring surface (29), and a sliding stop pin (27) inserted into the slot (15) is arranged in a right-angle frame formed by the third supporting part (25) and the lower edge covering (26).

2. The large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring as claimed in claim 1, wherein: the thickness of the first bright-band ring surface (28) and the second bright-band ring surface (29) is 0.3-0.4 mm.

3. The large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring as claimed in claim 1, wherein: the thickness of the iron sheet ring (2) is 1.5mm-2 mm.

4. The large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring as claimed in claim 1, wherein: the plane height difference of the end surfaces of the first bright band ring surface (28) and the second bright band ring surface (29) is 0.4mm-0.5 mm.

5. The large-diameter iron-plastic combined super-wear-resistant high-strength floating oil seal ring as claimed in claim 1, wherein: and sealant is filled 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.

6. A manufacturing method of a large-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,

step one, folding a long iron sheet which is heated, rolled and folded into a right angle into a circle, and welding a port to form an iron sheet ring (2);

step two, heating the bent iron sheet, and adopting a die to punch and fold a first supporting part (21), a first slope connecting part (22), a second supporting part (23), a second slope connecting part (24), a third supporting part (25) and a lower edge covering (26); the first supporting part (21) and the second supporting part (23) are subjected to die stamping and shaping processing, and the flatness of the first supporting part and the second supporting part is guaranteed to reach the standard;

thirdly, 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 (28) and a second bright band ring surface (29);

fourthly, welding a sliding stop pin (27) in a right-angle frame formed by a third supporting part (25) of the iron sheet ring (2) and the lower edge covering (26);

fifthly, grinding and polishing the first bright band ring surface (28) and the second bright band ring surface (29) 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 to form a plastic ring body (1) by injection molding;

and step seven, coating sealant on the contact surface of the iron leather ring (2) and the plastic ring body (1), and inserting the anti-slip pin (27) 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.

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