Floating seal ring working wear clearance adjustment and compensation device

Abstract

The present invention provides a floating seal ring working wear clearance adjustment and compensation device, the adjustment and compensation device is installed on the dynamic seat cavity, the floating seal ring and the rubber ring are installed in the dynamic seat cavity, the dynamic seat cavity and the shaft are sealed by the shaft sealing rubber ring, the center of the shaft is provided with an adjustment screw hole in the axial direction, the outer side of the shaft is provided with a bayonet position groove penetrating the shaft in the radial direction, a bayonet is installed in the bayonet position groove, the outer end of the dynamic seat cavity shaft hole is provided with a bayonet position, the bayonet is inserted into the shaft bayonet position, and at the same time, the bayonet is inserted into the bayonet position of the shaft bayonet position at the outer end of the dynamic seat cavity shaft hole, and the three are combined into a linkage body and can rotate in linkage with the shaft. The end of the shaft is provided with an adjustment screw inserted into the adjustment screw hole, one end of the adjustment screw is located outside the end of the shaft, and the other end passes through the adjustment screw hole and contacts the bayonet. The working wear clearance of the floating seal ring is variable and adjustable, and random wear compensation can be performed, so that the service life of the floating seal ring can be extended exponentially.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, in particular to a floating seal ring working wear clearance adjustment and compensation device. Background Art

[0002] The sealing performance and working life of floating seals are the core indicators of their quality. Oil leakage is a key sign of failure of the floating seal ring. There are many reasons for oil leakage, and the most direct and common reason is that the long working time and insufficient elasticity of the rubber ring cannot make up for the wear of the working surfaces of the two iron rings, which increases the gap between the fitting surfaces and causes leakage. At this time, replacing the floating seal is the only option. However, if the design can be changed to make the installation and working pressure setting of the floating seal ring variable and adjustable, and random wear compensation can be performed, the service life of the floating seal ring can be extended exponentially. This is undoubtedly to make the best use of everything and bring the superior functions of the floating seal to the extreme. It can bring huge economic and social benefits. It can achieve energy conservation and environmental protection, save resources, reduce costs, improve the equipment use rate, and benefit society. Summary of the invention

[0003] The object of the present invention is to provide a floating seal ring working wear clearance adjustment and compensation device, which can adjust and compensate the working wear clearance of the floating seal ring and extend the working life of the floating oil seal.

[0004] The technical solution of the present invention:

[0005] A floating seal ring working wear clearance adjustment and compensation device, the adjustment and compensation device is installed on a dynamic seat cavity, a floating seal ring and a rubber ring are installed in the dynamic seat cavity, the dynamic seat cavity and the shaft are sealed by a shaft sealing rubber ring, an adjustment screw hole is opened in the center of the shaft along the axial direction, a pin positioning groove penetrating the shaft is opened in the outer side of the shaft along the radial direction, a pin is installed in the pin positioning groove, a dynamic seat cavity positioning groove is opened at the end of the dynamic seat cavity, an adjustment screw inserted into the adjustment screw hole is installed at the end of the shaft, one end of the adjustment screw is located outside the end of the shaft, and the other end passes through the adjustment screw hole and contacts with the pin, and the other end of the pin is in the dynamic seat cavity positioning groove to push the dynamic seat cavity.

[0006] The end of the movable seat cavity is also provided with a protective cover for covering the end of the shaft.

[0007] The protective cover is connected to the side wall of the moving seat cavity through threads.

[0008] One end of the latch slot is located outside the moving seat cavity, and the other end extends into the moving seat cavity. The length of the latch slot extending into the moving seat cavity is at least 6-10 mm.

[0009] The length of the bayonet slot outside the moving seat cavity is the same as the width of the bayonet, which facilitates the installation of the bayonet. The bayonet length is greater than the shaft diameter; the bayonet is engaged in the bayonet slot of the moving seat cavity at the exposed part of the shaft, thereby forming an integrated linkage of the three and rotating with the shaft.

[0010] The end surface clearance a between the moving seat cavity and the static seat cavity is 8-10 mm.

[0011] Compared with the prior art, the invention has the following beneficial effects: by adjusting the screw to push the bayonet, the movable seat cavity is pushed, thereby achieving the purpose of adjusting and compensating the working wear clearance of the floating seal ring, realizing variable and adjustable, and being able to compensate for random wear, the service life of the floating seal ring can be doubled. The entire device has a simple structure, is easy to operate, achieves energy conservation and environmental protection, saves resources, reduces costs, improves the equipment use rate, and is beneficial to society. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall top view structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the overall front view structure of the present invention;

[0014] Figure 3 It is a schematic diagram of the bayonet structure of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The present invention provides a technical solution:

[0017] See also Figure 1 and Figure 2 , a floating seal ring working surface pressure and wear clearance adjustment and compensation device, the adjustment and compensation device is installed on a dynamic seat cavity 1, a floating seal ring 2 and a rubber ring 3 are installed in the dynamic seat cavity 1, the dynamic seat cavity 1 and the shaft 5 are sealed by a shaft sealing rubber ring 4, an adjusting screw hole 6 is opened in the center of the shaft 5 in the axial direction, a pin slot 7 penetrating the shaft 5 is opened in the radial direction on the outside of the shaft 5, a pin 9 is installed in the pin slot 7, a dynamic seat cavity slot 8 is opened at the end of the dynamic seat cavity 1, an adjusting screw 10 inserted into the adjusting screw hole 6 is installed at the end of the shaft 5, one end of the adjusting screw 10 is located outside the end of the shaft 5, and the other end passes through the adjusting screw hole 6 and contacts with the pin 9, and the other end of the pin 9 is in the dynamic seat cavity slot 8 to push the dynamic seat cavity 1.

[0018] A protective cover 11 is also installed at the end of the movable seat cavity 1 to cover the end of the shaft 5.

[0019] The protective cover 11 is connected to the side wall of the movable seat cavity 1 through threads.

[0020] One end of the bayonet slot 7 is located outside the moving seat cavity 1, and the other end extends into the moving seat cavity 1. The length of the shaft bayonet slot 7 extending into the moving seat cavity 1 is at least 6-10 mm. This length is exactly the stroke range of the bayonet for adjusting the large end surface gap between the two seat cavities.

[0021] The length of the bayonet slot 7 outside the movable seat cavity 1 is the same as the width of the bayonet 9 , which facilitates the installation of the bayonet 9 .

[0022] The present invention targets the key factor of the working principle of the floating oil seal, namely, the working surface of the floating seal ring, which must be easy to form an oil film without oil leakage. This requires that the floating seal ring should always maintain a very appropriate axial pressure from the time it is installed until the end of its working life. This appropriate pressure is the strength of the two floating seal iron ring working surfaces fitting together, which can seal the oil without dry grinding. However, the reality is that once the floating oil seal is installed, the pressure is fixed for life and cannot be changed.

[0023] What is particularly disadvantageous is that most designs have high pressure, thinking that the oil sealing effect will be better if the pressure is high. However, the greater the pressure, the greater the damage to the floating seal ring. Because the pressure is too high, the working surface of the floating seal iron ring fits too tightly, it is difficult to form a gap, and no oil film is formed at all. The working surfaces of the two iron rings are dry-ground until the dry grinding and wear make the wear-resistant layer of the working surface thinner. The pressure of the entire oil seal ring is therefore reduced, and an oil film is formed on the working surface, and the floating oil seal is truly in the correct state of use. However, at this time, the floating seal is severely damaged and works with illness. Because the bright band on the working surface of the iron ring is severely damaged by dry grinding, the quality of flatness and finish has long been lost, and it depends entirely on the elasticity of the rubber ring to keep working. How long the life can be in this way can only be left to fate.

[0024] At the same time, the strong pressure makes the working surface of the floating seal iron ring dry-grind, which is very likely to generate high temperature. The high temperature is transmitted to the rubber ring, which has great damage to the rubber ring, and it quickly ages and stiffens. Once this happens, oil leakage will occur soon. All these misfortunes are caused by the wrong design concept of "pressing tightly can seal the oil" and "pressing once for life". When the iron ring loses its thickness due to long-term wear, the rubber ring becomes stiff and aged due to long-term working time, the rebound force decreases, and the gap is not supplemented, it is very necessary to follow up with external force to tighten each other moderately from the axial direction so that the floating oil seal can continue to fit each other, just forming an oil film without leaking oil. At this time, the floating seal has not failed and can continue to work for a considerable period of time. This requires changing the previous misunderstanding that once the floating oil seal is installed, the pressure is fixed for life. In order to correctly understand the working principle of the floating oil seal, install and use it in accordance with the product characteristics, and set the clamping force according to the requirements of the equipment where the floating oil seal is located and the actual working environment conditions it faces, the initial pressure design during installation should be correctly optimized; after working for a period of time, the iron ring is worn and the fitting surface is loose, and the force is tightened again. In this way, the clamping force is adjusted gradually and gradually in a timely manner, so that the working fitting surfaces of the two floating seal iron rings always maintain a moderate pressure fit, which not only seals the oil, but also forms an oil film, and does not cause dry grinding problems. Similarly, the pressure is moderate during the initial installation, and the rubber ring is not damaged by strong pressure. Its normal performance is that the aging and stiffness are slowed down and the working life is extended. This is to implement moderate pressure during the initial installation, follow up with appropriate pressure replenishment for subsequent wear, and then follow up with appropriate pressure until the pressure is ineffective. At this time, the rubber ring is completely rigid and aged, has no elasticity, and has completely lost its functional role, but this process is twice or even several times longer than the "one pressure for life" method of use.

[0025] It can be seen that for the installation and use of floating oil seals, what needs to be particularly opposed is the wrong idea that "the tighter the pressure, the more oil can be sealed". It is necessary to highlight the concept of the correct, reasonable and appropriate pressure that the working surfaces of the two iron rings can form an oil film, work under lubrication, and seal the oil. Adapt to the characteristics of floating seals and use floating seals correctly. In theory, there is an oil film between the working surfaces of the two iron rings, which is lubricated, and there is no dry grinding, so its life will never be bad. But the rubber ring will definitely age and become stiff, and its life is limited. The present invention can improve the improper pressure on the rubber ring, prevent the high temperature erosion damage caused by dry grinding of the iron ring and cause the rapid aging of the rubber ring, and correctly use the floating oil seal. As long as the pressure is appropriate, the working surface of the iron ring is lubricated with an oil film, and the working life of the iron ring can be extended several times; it can also make the rubber ring age, delay the stiffening time as much as possible, and extend the service life exponentially. Only in this way can the floating seal function be correctly exerted, the floating seal be used scientifically, and the advantages of the floating oil seal product characteristics can be maximized, and the economic value and social benefits of making the best use of everything can be explored. However, the actual situation at home and abroad in the past is that once the floating oil seal is installed, the pressure will be lifelong. Usually, the pressure is too high and too tight, and the working bright band surface of the iron ring wears faster. Even when the pressure is too high, the working surfaces of the two iron rings are prone to dry grinding and heating, and the high temperature generated is the most direct hazard that causes the rubber ring to age and stiffen quickly; at the same time, excessive pressure not only accelerates the stiffening and aging of the rubber ring, but also causes the rubber ring to break and tear under strong pressure. Even if the floating seal ring survives the early strong pressure, the iron ring will be worn, making the working surface thinner, which can free up some space and reduce the pressure on the rubber ring. However, as time goes by, the gap between the fitting surfaces of the iron ring increases due to wear, and the stiffening and aging of the rubber ring accelerates under high temperature and high pressure, and the elasticity of the rubber ring becomes weaker. At this time, the elasticity cannot be used to make up for the continuous wear of the iron ring, and more gaps are left. At this time, the working bright band surface of the iron ring is not tightly fitted, and the oil film is easier to form, but because the elasticity of the rubber ring becomes increasingly stiff due to aging, it is no longer able to use the elasticity to make up for the widening gap, and it is not far from oil leakage. It is known that the original floating seal ring and seat cavity installation had major design flaws and misunderstandings, that is, "press hard and it will last a lifetime". This is the greatest harm to the service life of the floating seal ring, killing its good performance advantages and ruining its proper use effect and life.

[0026] By screwing in the adjustment screw to push the pin, the pin is pushed from the axial direction, and the pin pushes against the movable seat cavity to make the two floating seal rings close to each other, which not only seals the oil, but also allows the iron ring working bright belt surface to be lubricated with oil film. This pressure is the most appropriate force. After working for a long time, when the floating seal iron ring joint surface leaks oil, the adjustment screw can be screwed in to timely compensate for the relaxation caused by the wear of the iron ring and the insufficient elasticity of the rubber ring, so that the floating seal ring can restore the appropriate fit and continue to seal the oil. Through the adjustment of this screw, the pressure can be relieved by over-tightening and pressurized by over-loosening; it can be adjusted in time and appropriately to always maintain the correct and appropriate axial compression force that should be maintained continuously. Correct use of floating seals can completely solve the following problems: 1. The initial installation pressure is too high, which damages the floating seal; 2. Due to over-tight installation, the iron ring joint surface is dry-ground, the rubber ring is over-pressurized, and the aging is accelerated; 3. This kind of artificial error in installation and use of floating seals makes the performance of the entire equipment shameful and the floating seal ring is wronged.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floating seal ring working wear clearance adjustment and compensation device, the adjustment and compensation device is installed on a dynamic seat cavity (1), a floating seal ring (2) and a rubber ring (3) are installed in the dynamic seat cavity (1), and the dynamic seat cavity (1) and the shaft (5) are sealed by a shaft sealing rubber ring (4), characterized in that: An adjusting screw hole (6) is provided at the center of the shaft (5) in the axial direction, a latch slot (7) penetrating the shaft (5) is provided on the outer side of the shaft (5) in the radial direction, a latch pin (9) is installed in the latch slot (7), a moving seat cavity latch slot (8) is provided at the end of the moving seat cavity (1), an adjusting screw rod (10) inserted into the adjusting screw hole (6) is installed at the end of the shaft (5), one end of the adjusting screw rod (10) is located outside the end of the shaft (5), and the other end passes through the adjusting screw hole (6) and contacts the latch pin (9), and the other end of the latch pin (9) is located in the moving seat cavity latch slot (8) to push the moving seat cavity (1); The end of the movable seat cavity (1) is also provided with a protective cover (11) for covering the end of the shaft (5); The protective cover (11) is connected to the side wall of the movable seat cavity (1) via threads; One end of the latch slot (7) is located outside the movable seat cavity (1), and the other end extends into the movable seat cavity (1).

2. The floating seal ring working wear clearance adjustment and compensation device according to claim 1, characterized in that: The length of the latch pin (9) is greater than the diameter of the shaft (5); and a latch pin hole (12) is reserved at one end of the latch pin (9) that passes through the latch pin slot (7) for facilitating the insertion of the latch pin (13).

3. The floating seal ring working wear clearance adjustment and compensation device according to claim 1, characterized in that: The latch pin (9) is engaged with the movable seat cavity engaging groove (8) at the exposed portion of the shaft (5), thereby forming an integral linkage among the latch pin (9), the shaft (5) and the movable seat cavity (1) so as to rotate with the shaft.

4. The floating seal ring working wear clearance adjustment and compensation device according to claim 1, characterized in that: The end surface clearance a between the moving seat cavity (1) and the stationary seat cavity is 8-10 mm.

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