Sealing mechanism of condensation pump

Abstract

The sealing mechanism of the condensation pump comprises a seat ring and a shaft rod penetrating through the seat ring, a sealing notch is formed in the position, located on the outer side of the shaft rod, in the seat ring, a sealing piece is arranged in the sealing notch, the sealing piece comprises a metal outer ring and a graphite inner ring, and the metal outer ring is connected with the graphite inner ring. Positioning pieces are symmetrically arranged on the outer side of the metal outer ring, and positioning grooves allowing the positioning pieces to be inserted therein are formed in the inner wall of the sealing notch; in the process that the sealing element is installed in the sealing notch, the positioning element can be inserted into the positioning groove, so that the sealing element can be limited, the sealing element can be static without being firmly embedded into the sealing notch through the design, the sealing element cannot rotate along with the shaft rod, and the sealing element is prevented from rotating along with the shaft rod. And meanwhile, the outer ends of the positioning side strips extend out of the positioning grooves, and the buckling grooves are formed in the positioning side strips, so that personnel can easily detach the sealing element by directly buckling the buckling grooves, and the sealing element is convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of condensate pump seals, and in particular relates to a sealing mechanism for a condensate pump. Background Art

[0002] A condensation pump is a vacuum pump that uses a low-temperature surface to condense gas, also known as a condensation pump. When the cooling pump is working, negative pressure is generated in its cavity. In order to ensure reliable sealing, a sealing mechanism is provided on the condensation pump. After searching, a sealing mechanism for a condensation pump is recorded in a Chinese patent application with application number CN202120421012.7. In this patent, a stationary sealing ring is designed that can remain stationary and does not rotate with the shaft, thereby slowing down the wear rate and helping to ensure the sealing effect.

[0003] However, the above patent still has certain shortcomings in actual use. The above patent is to extrude a sealing ring inside the sealing groove and apply extrusion force to the sealing ring by arranging a sealing end cover on the outside, so as to keep the sealing ring still. This design requires that the sealing ring is firmly embedded in the sealing groove, which makes it very difficult to remove the sealing ring. After a long time, the sealing ring is worn and it is difficult to replace it. Therefore, it is necessary to design a new sealing mechanism to solve this problem. Utility Model Content

[0004] The utility model aims to provide a sealing mechanism for a condensate pump, so as to solve the problem that the sealing ring in the cited patent proposed in the above background technology is not convenient to be disassembled and replaced.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing mechanism of a condensate pump, comprising a seat ring and a shaft rod passing through the seat ring, the interior of the seat ring located on the outside of the shaft rod is provided with a sealing groove, the interior of the sealing groove is provided with a sealing member, the sealing member comprises a metal outer ring and a graphite inner ring, positioning members are symmetrically provided on the outside of the metal outer ring, a positioning groove for inserting the positioning member is provided on the inner wall of the sealing groove, the positioning member comprises a positioning side strip and a buckle groove, the outer end of the positioning side strip extends out of the positioning groove, and the buckle groove is provided on the surface of the positioning side strip.

[0006] Preferably, the graphite inner ring is arranged on the inner side of the metal outer ring and fits with the outer surface of the shaft.

[0007] Preferably, a connecting cover assembly is provided on the surface of the seat ring located on the outside of the seal, and the connecting cover assembly includes a cover body and a center hole, the center hole is opened in the middle of the cover body for the shaft rod to pass through, and a connecting ring groove connected to the connecting cover assembly is opened on the surface of the seat ring.

[0008] Preferably, the connecting cover assembly further comprises an external thread, the external thread is provided on the outer edge surface of the cover body, the inner wall of the connecting ring groove is provided with an internal thread matching the external thread, and the cover body is threadedly connected to the connecting ring groove.

[0009] Preferably, the connecting cover assembly further comprises a rotary handle, and the rotary handle is fixed on the outer surface of the cover body.

[0010] Preferably, a lubrication assembly is provided inside the seal, and the lubrication assembly includes an oil filling groove and an oil guide groove. The oil filling groove is symmetrically opened inside the metal outer ring, and one end leads to the outside of the metal outer ring. The oil guide groove is opened inside the metal outer ring and the graphite inner ring. One end of the oil guide groove is connected to the oil filling groove, and the other end leads to the inner side of the graphite inner ring.

[0011] Preferably, the lubrication assembly further comprises a sealing ring, which is arranged inside the cover body and squeezed on the outer port of the oil filling tank.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] When installing the seal into the sealing groove, the positioning piece can be inserted into the interior of the positioning groove to limit the seal. This design can achieve the stationary state of the seal without the need for the seal to be firmly embedded in the interior of the sealing groove, so that the seal will not rotate with the shaft rod. At the same time, the outer end of the positioning side strip extends out of the positioning groove and is provided with a buckle groove. Therefore, personnel can easily remove the seal by directly buckling the buckle groove, thereby facilitating the replacement of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front cross-sectional view of the utility model;

[0015] Figure 2 For this utility model Figure 1 A three-dimensional view of the middle seal and the positioning member;

[0016] Figure 3 For this utility model Figure 1 A perspective view of the middle connection cover assembly;

[0017] Figure 4 For this utility model Figure 1 A partial enlarged view of the lubrication component;

[0018] In the figure: 100, seat ring; 200, shaft; 300, sealing notch; 400, sealing element; 401, metal outer ring; 402, graphite inner ring; 500, positioning element; 501, positioning side strip; 502, buckle groove; 600, positioning groove; 700, connecting cover assembly; 701, cover body; 702, center hole; 703, rotary handle; 704, external thread; 800, connecting ring groove; 900, lubrication assembly; 901, oil filling groove; 902, oil guide groove; 903, sealing ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] See also Figures 1 to 4The utility model provides a technical solution: a sealing mechanism of a condensate pump, comprising a seat ring 100 and a shaft 200 penetrating the seat ring 100, a sealing notch 300 is provided inside the seat ring 100 and located outside the shaft 200, the sealing notch 300 is annular in structure, a sealing member 400 is provided inside the sealing notch 300, the sealing member 400 comprises a metal outer ring 401 and a graphite inner ring 402, the graphite inner ring 402 is provided inside the metal outer ring 401, and is in contact with the outer surface of the shaft 200. The surfaces are fitted to ensure good sealing. The outer side of the metal outer ring 401 is symmetrically provided with a positioning piece 500. The inner wall of the sealing notch 300 is provided with a positioning groove 600 for inserting the positioning piece 500. The sealing piece 400 is limited so that it will not rotate with the shaft 200. The positioning piece 500 includes a positioning side strip 501 and a buckle groove 502. The outer end of the positioning side strip 501 extends out of the positioning groove 600. The buckle groove 502 is provided on the surface of the positioning side strip 501. The sealing piece can be directly buckled by the buckle groove 502. 400 is removed from the inside of the sealing notch 300, and the surface of the seat ring 100 is located on the outside of the seal 400 and is provided with a connecting cover assembly 700, the connecting cover assembly 700 includes a cover body 701 and a middle hole 702, the middle hole 702 is opened in the middle of the cover body 701 and is passed through by the shaft 200, and the surface of the seat ring 100 is provided with a connecting ring groove 800 connected to the connecting cover assembly 700, which is blocked on the outside of the seal 400 by the cover body 701, thereby limiting the seal 400 and preventing the seal from being blocked. 400 falls off from the inside of the sealing groove 300, the connecting cover assembly 700 also includes an external thread 704, the external thread 704 is arranged on the outer edge surface of the cover body 701, the inner wall of the connecting ring groove 800 is provided with an internal thread matched with the external thread 704, which can realize the threaded connection between the cover body 701 and the connecting ring groove 800, and ensure the stable connection of the cover body 701, the connecting cover assembly 700 also includes a handle 703, the handle 703 is fixed on the outer surface of the cover body 701, and is used to rotate the cover body 701.

[0022] In this embodiment, preferably, a lubrication component 900 is provided inside the seal 400, and oil can be regularly added between the graphite inner ring 402 and the shaft rod 200 through the lubrication component 900 to ensure good lubrication. The lubrication component 900 includes an oil filling groove 901 and an oil guide groove 902. The oil filling groove 901 is symmetrically arranged inside the metal outer ring 401, and one end leads to the outside of the metal outer ring 401, and lubricating oil can be injected into the oil filling groove 901. The oil guide groove 902 is arranged inside the metal outer ring 401 and the graphite inner ring 402. One end of the oil guide groove 902 is connected to the oil filling groove 901, and the other end leads to the inner side of the graphite inner ring 402. The lubricating oil enters between the graphite inner ring 402 and the shaft rod 200 through the oil guide groove 902 to play a lubricating role.

[0023] In this embodiment, preferably, the lubrication assembly 900 further includes a sealing ring 903, which is disposed inside the cover body 701 and squeezed on the outer port of the oil filling groove 901 to prevent the lubricating oil from spilling out.

[0024] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing mechanism for a condensate pump, comprising a seat ring (100) and a shaft (200) penetrating the seat ring (100), characterized in that: The seat ring (100) is provided with a sealing notch (300) on the outside of the shaft (200), and a sealing member (400) is provided inside the sealing notch (300). The sealing member (400) includes a metal outer ring (401) and a graphite inner ring (402). Positioning members (500) are symmetrically provided on the outside of the metal outer ring (401). The inner wall of the sealing notch (300) is provided with a positioning groove (600) for inserting the positioning member (500). The positioning member (500) includes a positioning side strip (501) and a buckle groove (502). The outer end of the positioning side strip (501) extends out of the positioning groove (600), and the buckle groove (502) is provided on the surface of the positioning side strip (501).

2. The sealing mechanism of a condensate pump according to claim 1, characterized in that: The graphite inner ring (402) is arranged on the inner side of the metal outer ring (401) and fits with the outer surface of the shaft (200).

3. The sealing mechanism of a condensate pump according to claim 1, characterized in that: The surface of the seat ring (100) is located outside the seal (400) and is provided with a connecting cover assembly (700), the connecting cover assembly (700) includes a cover body (701) and a center hole (702), the center hole (702) is opened in the middle of the cover body (701) and is for the shaft (200) to pass through, and the surface of the seat ring (100) is provided with a connecting ring groove (800) connected to the connecting cover assembly (700).

4. The sealing mechanism of a condensate pump according to claim 3, characterized in that: The connecting cover assembly (700) further comprises an external thread (704), wherein the external thread (704) is provided on the outer edge surface of the cover body (701), and the inner wall of the connecting ring groove (800) is provided with an internal thread matching the external thread (704), and the cover body (701) is threadedly connected to the connecting ring groove (800).

5. The sealing mechanism of a condensate pump according to claim 4, characterized in that: The connecting cover assembly (700) further comprises a rotating handle (703), wherein the rotating handle (703) is fixed on the outer surface of the cover body (701).

6. The sealing mechanism of a condensate pump according to claim 5, characterized in that: A lubrication assembly (900) is arranged inside the sealing member (400), and the lubrication assembly (900) comprises an oil filling groove (901) and an oil guide groove (902). The oil filling groove (901) is symmetrically arranged inside the metal outer ring (401), and one end of the oil guide groove (902) leads to the outside of the metal outer ring (401). The oil guide groove (902) is arranged inside the metal outer ring (401) and the graphite inner ring (402). One end of the oil guide groove (902) is communicated with the oil filling groove (901), and the other end leads to the inside of the graphite inner ring (402).

7. The sealing mechanism of a condensate pump according to claim 6, characterized in that: The lubrication assembly (900) further comprises a sealing ring (903), which is arranged inside the cover body (701) and is pressed against the outer port of the oil filling groove (901).

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