Gravity end face rotary sealing mechanism

Abstract

The utility model provides a gravity end face rotary sealing mechanism which is installed between a shell and a rotary funnel, a sealing panel is fixedly arranged on the outer wall of the rotary funnel in a sleeved mode, and the sealing panel is located below the shell. The section of the elastic sealing ring is in a C shape, the elastic sealing ring comprises an upper fixing ring, a lower sealing ring and a middle elastic ring, the outer wall of the rotating funnel is sleeved with the elastic sealing ring in an empty mode and located between the shell and the sealing panel, a C-shaped opening of the elastic sealing ring is opposite to the rotating funnel, and the upper fixing ring is attached to and fixed to the bottom end face of the shell. A plurality of annular sealing filler grooves are formed in the face, facing the sealing panel, of the lower sealing ring, the sealing filler grooves are filled with sealing filler, and the sealing filler is in tight contact with the sealing panel in a sealed mode. According to the sealing mechanism, the gap between the rotary funnel and the inner wall of the shell is sealed through the elastic sealing ring and the sealing panel, the sealing effect is good, the structure is simple, installation is convenient, and the service life is long.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, concretely relates to a gravity end face rotary seal mechanism. BACKGROUND

[0002] Mechanical seal equipment is the device for preventing the leakage of fluid in the equipment, and the contact seal and the labyrinth seal are two main forms of the mechanical seal, wherein the labyrinth seal is provided with a plurality of annular sealing teeth arranged in sequence around the rotating shaft, a series of interception gaps and expansion cavities are formed between the teeth, and the sealed medium generates throttling effect when passing through the gaps of the zigzag labyrinth to achieve the purpose of leakage prevention. Since there is a gap between the rotor and the casing of the labyrinth seal, there is no solid contact, and thermal expansion is allowed, so it is suitable for high temperature, high pressure and high rotation speed occasions, and this sealing form is widely used for the shaft end and the sealing between the stages of the steam turbine, the gas turbine, the compressor and the blower. However, for some occasions with high sealing performance requirements, the contact seal is usually used to seal the rotating shaft, the leakage rate of the sealed medium in the contact seal is very low, the zero leakage of the fluid in the sealing cavity is ensured, and the purpose of preventing the pollutants outside from entering the sealing cavity is also achieved.

[0003] In addition to the high requirement on the sealing performance, there is also a high requirement on the service life of the sealing device. At present, there are various sealing device products in the field, and the structures are complex or simple, the sealing performance and the service life are different. However, in general, it is still the expectation of the technical personnel in the field to provide a sealing device with good sealing performance, simple structure and long service life. SUMMARY

[0004] The utility model provides a gravity end face rotary seal mechanism, the sealing mechanism is sealed to the gap between the rotating funnel and the inner wall of shell through the elastic sealing ring and the sealing panel, and the sealing effect is good, and the structure is simple, convenient to install, and long in service life.

[0005] The technical scheme adopted by the utility model to achieve the above-mentioned purposes is as follows:

[0006] A gravity end face rotary seal mechanism is installed between a shell and a rotating funnel, the shell covers the upper part of the rotating funnel, the gap between the rotating funnel and the inner wall of the shell is a sealing cavity, and the gravity end face rotary seal mechanism comprises:

[0007] A sealing panel, which is annular as a whole, is fixed on the outer wall of the rotating funnel, and the sealing panel is located below the shell;

[0008] The elastic sealing ring is provided with an oil injection hole which is in communication with the outside and the sealing cavity, and the sealing material is lubricated by injecting lubricating oil from the outside, thereby reducing the abrasion of the sealing material and prolonging the service life of the whole sealing mechanism.

[0009] The sealing panel is welded to the rotary funnel.

[0010] The bottom surface of the sealing panel is connected with the rotary funnel through a reinforcing rib.

[0011] The bottom end surface of the shell is fixedly connected with a flange, and the upper fixed ring is fixedly attached to the flange.

[0012] The upper fixed ring is tightly attached to the bottom surface of the flange through a fixed pressing plate which is annular as a whole, and the flange, the upper fixed ring and the fixed pressing plate are locked and fixed through bolts.

[0013] The lower sealing ring is provided with a gravity pressing plate which is annular as a whole on the side away from the sealing panel, and the gravity pressing plate is tightly pressed on the lower sealing ring, so that the sealing material on the lower sealing ring is always in close contact with the sealing panel.

[0014] The outer side of the side of the lower sealing ring away from the sealing panel is provided with an annular limiting step which limits the gravity pressing plate.

[0015] The elastic sealing ring is provided with an oil injection hole which is in communication with the outside and the sealing cavity, and the sealing material is lubricated by injecting lubricating oil from the outside, thereby reducing the abrasion of the sealing material and prolonging the service life of the whole sealing mechanism.

[0016] The oil injection hole is located at the lower sealing ring.

[0017] The sealing material groove is provided with two.

[0018] Compared with the prior art, the gravity end face rotary sealing mechanism has the following advantages: 1. The sealing mechanism provided in the utility model seals the gap between the rotary funnel and the inner wall of the shell through the elastic sealing ring and the sealing panel, and has good sealing effect, simple structure, convenient installation and long service life; 2. The elastic sealing ring is in contact with the sealing panel through the sealing material, and has good sealing effect; and 3. The elastic sealing ring is provided with an oil injection hole which is in communication with the outside and the sealing cavity, and the sealing material is lubricated by injecting lubricating oil from the outside, thereby reducing the abrasion of the sealing material and prolonging the service life of the whole sealing mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The utility model provides a whole structure schematic diagram of gravity end face rotary sealing mechanism.

[0020] In the figure: 1 - shell, 2 - rotary hopper, 3 - blanking pipe, 4 - sealing cavity, 5 - sealing panel, 6 - reinforcing rib, 7 - upper fixed ring, 8 - lower sealing ring, 9 - middle elastic ring, 10 - flange, 11 - fixed pressing plate, 12 - bolt, 13 - sealing packing groove, 14 sealing packing, 15 - gravity pressing plate, 16 - limiting step, 17 - oil injection hole. DETAILED DESCRIPTION

[0021] The utility model will be described in detail below in combination with the drawings.

[0022] The gravity end face rotary sealing mechanism provided by the embodiment is installed between the shell 1 and the rotary hopper 2, as shown in the figure. Figure 1 The shell covers the upper part of the rotary hopper, and the blanking pipe 3 in the shell extends into the rotary hopper. In order to avoid leakage of materials from the gap between the shell and the rotary hopper during blanking, the gravity end face rotary sealing mechanism is used to seal the gap between the shell and the rotary hopper, and a sealing cavity 4 is formed in the gap between the rotary hopper and the inner wall of the shell.

[0023] The gravity end face rotary sealing mechanism in the embodiment includes a sealing panel 5 and an elastic sealing ring. The sealing panel is annular in shape, is fixed on the outer wall of the rotary hopper, and is located below the shell. Specifically, the sealing panel is welded and fixed to the rotary hopper, and there is no gap between the two. Further, the bottom surface of the sealing panel is connected to the rotary hopper by a reinforcing rib 6, which further ensures the stability of the connection between the sealing panel and the rotary hopper. When the rotary hopper is working, the sealing panel rotates synchronously with the rotary hopper.

[0024] The cross section of the elastic sealing ring in the embodiment is in the shape of a "C", including an upper fixed ring 7 and a lower sealing ring 8 arranged in the transverse direction, and a middle elastic ring 9 with an arc-shaped cross section. The elastic sealing ring is sleeved on the outer wall of the rotary hopper and located between the shell and the sealing panel, and the "C" shaped opening of the elastic sealing ring faces away from the rotary hopper. The upper fixed ring of the elastic sealing ring is fixed against the bottom end surface of the shell. Specifically, the bottom end surface of the shell is fixedly connected to a flange 10, and the upper fixed ring is fixed against the flange. Further, the upper fixed ring is pressed against the bottom surface of the flange by a fixed pressing plate 11 which is annular in shape, and the flange, the upper fixed ring and the fixed pressing plate are locked and fixed by a bolt 12.

[0025] The lower sealing ring of the elastic sealing ring is provided with a plurality of annular sealing packing grooves 13 on the side facing the sealing panel, two sealing packing grooves are provided in the embodiment, the sealing packing grooves are filled with sealing packing 14, and the sealing packing is in close contact with the sealing panel, so that the gap between the rotary funnel and the inner wall of the shell is sealed through the sealing panel and the elastic sealing ring. Specifically, the side of the lower sealing ring away from the sealing panel is provided with a gravity pressing plate 15 in the form of a whole ring, the gravity pressing plate is pressed on the lower sealing ring through its own gravity, so that the sealing packing on the lower sealing ring is always in close contact with the sealing panel, and the sealing effect is ensured. Further, the outer side of the side of the lower sealing ring away from the sealing panel is provided with a limiting step 16 in the form of a ring, which limits the gravity pressing plate.

[0026] In the embodiment, the elastic sealing ring is provided with an oil injection hole 17 communicating with the outside and the sealing cavity. Specifically, the oil injection hole is located at the lower sealing ring; further, when the gravity pressing plate is provided and the sealing packing groove is provided with two, the oil injection hole penetrates the gravity pressing plate and the lower sealing ring in the vertical direction, and the oil injection hole is located between the two sealing packing grooves. Through the injection of lubricating oil from the outside, the sealing packing on both sides is lubricated, the wear of the sealing packing is slowed down, and the service life of the whole sealing mechanism is prolonged.

Claims

1. A gravity-driven end-face rotary sealing mechanism, installed between a housing and a rotating funnel, wherein the housing covers the rotating funnel, and the gap between the rotating funnel and the inner wall of the housing forms a sealing cavity, characterized in that: The gravity end face rotary sealing mechanism comprises: A sealing panel in the shape of a whole ring is fixed on the outer wall of the rotary funnel and below the shell; An elastic sealing ring in the shape of a "C" section comprises an upper fixed ring and a lower sealing ring arranged in the transverse direction and a middle elastic ring in the shape of an arc, is sleeved on the outer wall of the rotary funnel and between the shell and the sealing panel, and the "C" section opening of the elastic sealing ring faces away from the rotary funnel, the upper fixed ring of the elastic sealing ring is fixed against the bottom end surface of the shell, and the lower sealing ring of the elastic sealing ring is provided with a plurality of annular sealing packing grooves on the side facing the sealing panel, the sealing packing grooves are filled with sealing packing, and the sealing packing is in close contact with the sealing panel.

2. The gravity end face rotary seal mechanism according to claim 1, characterized by: The sealing panel is welded and fixed with the rotary funnel.

3. The gravity end face rotary seal mechanism of claim 1, wherein: A reinforcing rib is connected between the bottom surface of the sealing panel and the rotary funnel.

4. The gravity end face rotary seal mechanism of claim 1, wherein: A flange is fixedly connected to the bottom end surface of the shell, the upper fixed ring is fixed against the flange.

5. The gravity end face rotary seal mechanism of claim 4, wherein: The upper fixed ring is pressed against the bottom surface of the flange by a fixed pressing plate in the shape of a whole ring, and the flange, the upper fixed ring and the fixed pressing plate are locked and fixed by bolts.

6. The gravity end face rotary seal mechanism of claim 1, wherein: A gravity pressing plate in the shape of a whole ring is arranged on the side of the lower sealing ring facing away from the sealing panel, the gravity pressing plate is pressed against the lower sealing ring, and the sealing packing on the lower sealing ring is always in close contact with the sealing panel.

7. The gravity end face rotary seal mechanism of claim 6, wherein: A limiting step in the shape of a ring is arranged on the outer side of the side of the lower sealing ring facing away from the sealing panel, and the gravity pressing plate is limited.

8. The gravity end face rotary seal mechanism of claim 1, wherein: An oil injection hole is arranged on the elastic sealing ring and communicates with the outside and the sealing cavity.

9. The gravity end face rotary seal mechanism of claim 8, wherein: The oil injection hole is located at the lower sealing ring.

10. The gravity end face rotary seal mechanism of claim 1, wherein: The sealing packing grooves are provided with two.

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