Reinforced embedded type mechanical sealing graphite ring

Abstract

The utility model provides a reinforced inlaid type mechanical sealing graphite ring. The reinforced embedded type mechanical seal graphite ring comprises a metal ring seat, a graphite ring and a metal supporting ring, the metal supporting ring is arranged in an inner hole of the graphite ring, the metal supporting ring is in clearance fit with the graphite ring, and the outer circle of the graphite ring is in interference fit with the metal ring seat. According to the reinforced embedded type mechanical sealing graphite ring, the metal supporting ring is installed in the inner hole of the graphite ring, the graphite ring is placed between the metal base and the metal supporting ring, and the inner and outer dual-supporting structure is adopted, so that the compressive strength of the graphite ring is improved, deformation of the graphite ring is restrained, leakage is reduced, and it is ensured that the sealing end face is flat; the risk of sealing end face breakage under the high-pressure working condition is reduced; and through the design of the split type metal supporting ring, the metal supporting ring can be rapidly replaced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, especially a kind of reinforced inlay type mechanical seal graphite ring. BACKGROUND

[0002] Mechanical seal is by two annular parts of mutual adhesion and relative sliding, rotating part is called dynamic ring when working, and the one that does not rotate is called static ring.Mechanical seal dynamic ring and static ring friction when working can generate heat, the expansion coefficient of metal ring seat and the expansion system of graphite material have difference, the interference amount when inlay needs to consider transmission under working temperature (avoid heating and make graphite ring loose from metal ring seat) and sealing property (metal ring seat and graphite ring combination place under certain pressure cannot have liquid leakage);The elastic modulus of graphite ring material is relatively low, so the anti-deformation ability of graphite itself is relatively weak, interference amount is too large to make graphite have larger deformation, not conducive to sealing end face flatness, especially graphite ring compression strength is relatively low, when receiving liquid medium high pressure, the risk of sealing end face fracture can occur. SUMMARY

[0003] The utility model provides a kind of reinforced inlay type mechanical seal graphite ring to the technical problem in the above background technology.

[0004] The utility model solves the above technical problem by the following technical scheme:

[0005] The utility model provides a kind of reinforced inlay type mechanical seal graphite ring. The mechanical seal graphite ring includes metal ring seat, graphite ring and metal support ring,

[0006] The metal support ring is arranged in the graphite ring inner hole, the metal support ring is gap fit with the graphite ring, and the graphite ring outer circle is interference fit with the metal ring seat.

[0007] Preferably, the gap amount of gap fit is ≤0.05mm, and the interference amount of interference fit is 0.1-0.3mm.

[0008] Preferably, the metal support ring is split type structure, including two half rings, and the two half rings are connected by bolt.

[0009] Preferably, annular groove is arranged on the surface of the metal support ring.

[0010] Preferably, the material of the metal support ring is stainless steel material or titanium alloy material.

[0011] Preferably, the thickness of the metal support ring is 20%-30% of the wall thickness of the graphite ring.

[0012] The utility model discloses a positive progress effect lies in: the utility model provides a kind of reinforced inlaid mechanical seal graphite ring.The reinforced inlaid mechanical seal graphite ring including metal ring seat, graphite ring and metal support ring, metal support ring is arranged in graphite ring inner hole, metal support ring and graphite ring clearance fit, graphite ring outer circle and metal ring seat interference fit.The reinforced inlaid mechanical seal graphite ring of the utility model is installed metal support ring in graphite ring inner hole, places graphite ring in the middle between metal seat and metal support ring, and the double support structure of inside and outside is used to make that graphite ring compression strength improves, inhibits graphite ring deformation, reduces leakage, ensures that sealing end face is even, reduces the risk of sealing end face fracture under high pressure working condition;Through the design of split type metal support ring, support quick replacement metal support ring, improve efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structural schematic diagram of the reinforced inlaid mechanical seal graphite ring of the utility model.

[0014] Legend: 1, metal ring seat; 2, graphite ring; 3, metal support ring; 4, annular groove. DETAILED DESCRIPTION

[0015] The utility model will be further illustrated by way of example, but not therefore limit the utility model in the range of the described embodiment.

[0016] Example 1

[0017] As Figure 1 Shown, the utility model provides a kind of reinforced inlaid mechanical seal graphite ring.The mechanical seal graphite ring including metal ring seat 1, graphite ring 2 and metal support ring 3, metal support ring 3 is arranged in graphite ring 2 inner hole, metal support ring 3 and graphite ring 2 clearance fit, graphite ring 2 outer circle and metal ring 1 seat interference fit.Wherein, the clearance amount of clearance fit is ≤0.05mm, and the interference amount of interference fit is 0.1-0.3mm.

[0018] In the embodiment, metal support ring 3 is split type structure, including two half annular, two half annular are connected by bolt, and annular groove 4 is set on the surface of metal support ring 3.

[0019] In the embodiment, the material of metal support ring 3 is stainless steel material or titanium alloy material.

[0020] In the embodiment, the thickness of metal support ring 3 is 20%-30% of the wall thickness of graphite ring 2.

[0021] The embodiment provides a reinforced inlaid mechanical seal graphite ring.The reinforced inlaid mechanical seal graphite ring comprises a metal ring seat, a graphite ring and a metal support ring, the metal support ring is arranged in a hole of the graphite ring, the metal support ring is in gap cooperation with the graphite ring, and the outer circle of the graphite ring is in interference fit with the metal ring seat.The reinforced inlaid mechanical seal graphite ring of the utility model is characterized in that the metal support ring is arranged in the hole of the graphite ring, the graphite ring is arranged between the metal seat and the metal support ring, the double inner-outer support structure is used to improve the compression strength of the graphite ring, inhibit the deformation of the graphite ring, reduce leakage, ensure the flatness of the sealing end face, and reduce the risk of fracture of the sealing end face under high-pressure working conditions; through the design of the split metal support ring, the metal support ring can be quickly replaced, and the efficiency is improved.

[0022] The working principle of the utility model is as follows: first, the metal support ring 3 is placed in the hole of the graphite ring 2, and the metal support ring 3 and the graphite ring 2 are in small gap cooperation; then, the graphite ring 2 and the metal support ring 3 are placed in the metal ring seat 1 together, the outer circle of the graphite ring 2 is larger than the hole of the metal ring seat 1, the difference between the two at room temperature is called an interference amount, the interference amount is reserved on the metal ring seat 1, and the graphite ring 2 and the metal support ring 3 are placed in the metal ring seat 1 by means of a press or expansion of the metal ring seat 1 by heating. Under the condition that the outer circle of the graphite ring 2 is subjected to external pressure, the graphite ring is deformed and shrinks, the pressure is transmitted to the metal support ring 3, the metal support ring 3 is closely attached to the graphite ring 2, and the inner surface of the graphite ring 2 obtains strong support force.

[0023] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the utility model, and the changes and modifications all fall within the protection scope of the utility model.

Claims

1. A reinforced mosaic mechanical seal graphite ring characterized by, The mechanical seal graphite ring comprises a metal ring seat, a graphite ring and a metal supporting ring, The metal supporting ring is arranged in the inner hole of the graphite ring, the metal supporting ring is in gap fit with the graphite ring, the outer circle of the graphite ring is in interference fit with the metal ring seat, the gap amount of the gap fit is less than or equal to 0.05 mm, and the interference amount of the interference fit is 0.1-0.3 mm.

2. The reinforced inlaid mechanical seal graphite ring of claim 1 wherein, The metal supporting ring is in a split structure and comprises two half rings which are connected by bolts.

3. The reinforced inlaid mechanical seal graphite ring of claim 2 wherein, An annular groove is arranged on the surface of the metal supporting ring.

4. The reinforced inlaid mechanical seal graphite ring of claim 3 wherein, The metal supporting ring is made of stainless steel or titanium alloy.

5. The reinforced inlaid mechanical seal graphite ring of claim 4 wherein, The thickness of the metal supporting ring is 20%-30% of the wall thickness of the graphite ring.

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