Novel shaft sealing seat

Abstract

The utility model discloses a novel shaft sealing seat in the field of shaft sealing seats, which comprises a sealing seat body, a shaft hole is arranged inside the sealing seat body, the sealing seat body is fixed with an equipment shell, a rotating shaft is arranged inside the equipment shell, and the rotating shaft penetrates through the shaft hole of the sealing seat body in a matched mode. An annular limiting step is arranged at the end, close to an equipment shell, of the inner wall of a shaft hole of the sealing seat body, a first embedding groove, a second embedding groove and a third embedding groove are sequentially formed in the inner wall of the shaft hole of the sealing seat body, and a rotating shaft sequentially penetrates through the first polytetrafluoroethylene packing, the sealing ring and the second polytetrafluoroethylene packing. A sealing end cover is arranged at the rear end of the sealing seat body and tightly presses the second polytetrafluoroethylene packing. The service life of the shaft sealing seat can be prolonged, the shaft sealing seat has high wear resistance and good sealing performance, and lasting sealing is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of shaft seal seats, and specifically relates to a novel shaft seal seat. Background Technology

[0002] Industries such as grain processing and feed processing often need to use equipment such as screw conveyors, mixers and elevators. All screw conveyors, mixers and elevators require rotating shafts. However, when the rotating shafts in the current equipment are rotating, the sealing performance of the seals often deteriorates after the equipment has been working for a long time. There is an urgent need for a shaft seal seat that can maintain stable operation and provide a good seal for a long time. Utility Model Content

[0003] The purpose of this invention is to provide a novel shaft seal seat that can extend the service life of the shaft seal seat, has high wear resistance, and good sealing performance, achieving a long-lasting seal.

[0004] The purpose of this utility model is achieved as follows: A novel shaft seal seat includes a seal seat body with a shaft hole inside. The seal seat body is fixed to a device housing. A rotating shaft is installed inside the device housing and passes through the shaft hole of the seal seat body. An annular limiting step is provided on the inner wall of the shaft hole of the seal seat body near the device housing. An insert groove 1, an insert groove 2, and an insert groove 3 are sequentially provided on the inner wall of the shaft hole of the seal seat body. An annular first polytetrafluoroethylene (PTFE) packing, a sealing ring, and a second PTFE packing are respectively installed in the insert groove 1, insert groove 2, and insert groove 3. The rotating shaft passes through the first PTFE packing, the sealing ring, and the second PTFE packing in sequence. A sealing end cap is provided at the rear end of the seal seat body, and the sealing end cap presses against the second PTFE packing.

[0005] During operation, the rotating shaft inside the device rotates, and is sealed by a first PTFE packing, a sealing ring, and a second PTFE packing. The left side of the device housing is the interior of the housing. The shaft seal seat is filled with PTFE packing. PTFE has high wear resistance, can be used for a long time, and is self-lubricating. After a period of use, it forms a lubricating oil film with the shaft, forming an oil film seal and also providing lubrication to reduce friction. The first and second PTFE packings on the front and rear sides form front and rear oil film seals for the rotating shaft, while the sealing ring forms a central seal, optimizing the sealing performance. Compared with the prior art, the advantages of this invention are: it can extend the service life of the shaft seal seat, has high wear resistance, and provides excellent sealing performance, achieving a long-lasting seal.

[0006] As a further improvement of this utility model, the sealing seat includes a rectangular mounting seat and a circular main seat. The main seat is located in the middle of the mounting seat, and the mounting seat is fixed to the equipment housing by four bolts forming a rectangle.

[0007] As a further improvement of this utility model, the sealing end cap has a circular outer circumference. An annular pressure cap is provided at one end of the sealing end cap near the sealing seat. The pressure cap fits into the shaft hole and presses against the second PTFE packing. The sealing end cap is fixedly connected to the sealing seat by several fasteners evenly distributed circumferentially. A through hole is provided in the center of the sealing end cap, and a rotating shaft is fitted through the through hole of the sealing end cap. The sealing end cap presses against the second PTFE packing, ensuring a good seal at the rear end.

[0008] As a further improvement of this utility model, the first polytetrafluoroethylene packing in the mounting groove is disposed against the inner side of the limiting step. The limiting step limits the first polytetrafluoroethylene packing.

[0009] As a further improvement of this utility model, the sealing ring is made of rubber. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the end face structure of the sealing seat.

[0012] Figure 3 This is a schematic diagram of the end face structure of the sealing end cap.

[0013] Among them, 1 is the sealing seat, 1a is the mounting seat, 1b is the main seat, 2 is the shaft hole, 3 is the equipment housing, 4 is the rotating shaft, 5 is the limiting step, 6 is the first insert groove, 7 is the second insert groove, 8 is the third insert groove, 9 is the first polytetrafluoroethylene packing, 10 is the sealing ring, 11 is the second polytetrafluoroethylene packing, 12 is the sealing end cap, 12a is the pressure cap body, and 13 is the through hole. Detailed Implementation

[0014] like Figure 1-3As shown, a novel shaft seal seat includes a seal seat body 1 with a shaft hole 2 inside. The seal seat body 1 is fixed to a device housing 3. The seal seat body 1 includes a rectangular mounting base 1a and a circular main base 1b, with the main base 1b located in the middle of the mounting base 1a. The mounting base 1a is fixed to the device housing 3 by four bolts forming a rectangle. A rotating shaft 4 is provided inside the device housing 3, and the rotating shaft 4 is fitted through the shaft hole 2 of the seal seat body 1. An annular limiting step 5 is provided on the inner wall of the shaft hole 2 of the seal seat body 1 near the end of the device housing 3. An insert groove 6 is sequentially formed on the inner wall of the shaft hole 2 of the seal seat body 1. The first PTFE packing 9, the sealing ring 10, and the second PTFE packing 11 are respectively installed in the second PTFE packing 7 and the third PTFE packing 8. The sealing ring 10 is made of rubber. The first PTFE packing 9 in the first PTFE packing 6 is set against the inner side of the limiting step 5. The limiting step 5 limits the first PTFE packing 9. The rotating shaft 4 passes through the first PTFE packing 9, the sealing ring 10, and the second PTFE packing 11 in sequence. A sealing end cap 12 is set at the rear end of the sealing seat 1. The sealing end cap 12 presses the second PTFE packing 11.

[0015] The sealing end cap 12 has a circular outer circumference. An annular pressure cap 12a is provided at one end of the sealing end cap 12 near the sealing seat 1. The pressure cap 12a fits into the shaft hole 2 and presses against the second polytetrafluoroethylene packing 11. The sealing end cap 12 is fixedly connected to the sealing seat 1 by several circumferentially distributed fasteners. A through hole 13 is provided in the middle of the sealing end cap 12, through which the rotating shaft 4 passes. The sealing end cap 12 presses against the second polytetrafluoroethylene packing 11, ensuring a good seal at the rear end.

[0016] During operation, the rotating shaft 4 inside the device rotates, and is sealed by the first PTFE packing 9, the sealing ring 10, and the second PTFE packing 11. The left side of the device housing 3 is the interior of the housing 3. The shaft seal seat is filled with PTFE packing. PTFE has high wear resistance, can be used for a long time, and has self-lubricating properties. After a period of use, it forms a lubricating oil film with the shaft, forming an oil film seal, and also provides lubrication and reduces friction. The first PTFE packing 9 and the second PTFE packing 11 on the front and rear sides form front and rear oil film seals for the rotating shaft 4, while the sealing ring 10 forms a central seal for the rotating shaft 4, optimizing the sealing performance. The advantages of this invention are: it can extend the service life of the shaft seal seat, has high wear resistance, and provides good sealing performance, achieving a long-lasting seal.

[0017] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A novel shaft seal seat, comprising a seal seat body, wherein a shaft hole is formed inside the seal seat body, the seal seat body is fixed to a device housing, and a rotating shaft is disposed inside the device housing, characterized in that, The rotating shaft is configured to pass through the shaft hole of the sealing seat. The inner wall of the shaft hole of the sealing seat is provided with an annular limiting step at one end near the equipment housing. The inner wall of the shaft hole of the sealing seat is provided with three insertion grooves in sequence: a first insertion groove, a second insertion groove, and a third insertion groove. An annular first polytetrafluoroethylene packing, a sealing ring, and a second polytetrafluoroethylene packing are respectively provided in the first insertion groove, the sealing ring, and the second insertion groove. The rotating shaft is configured to pass through the first insertion groove, the sealing ring, and the second insertion groove in sequence. A sealing end cap is provided at the rear end of the sealing seat, and the sealing end cap is pressed against the second insertion groove.

2. The novel shaft seal seat according to claim 1, characterized in that, The sealing seat includes a rectangular mounting seat and a circular main seat. The main seat is located in the middle of the mounting seat and is fixed to the equipment housing by four bolts forming a rectangle.

3. A novel shaft seal seat according to claim 1 or 2, characterized in that, The sealing end cap has a circular outer circumference. An annular pressure cap is provided at one end of the sealing end cap near the sealing seat. The pressure cap is fitted into the shaft hole and presses the second polytetrafluoroethylene packing. The sealing end cap is fixedly connected to the sealing seat by several fasteners evenly distributed along the circumference. A through hole is provided in the middle of the sealing end cap, and the rotating shaft is fitted through the through hole of the sealing end cap.

4. A novel shaft seal seat according to claim 1 or 2, characterized in that, The first polytetrafluoroethylene packing in the mounting groove is set against the inner side of the limiting step.

5. A novel shaft seal seat according to claim 1 or 2, characterized in that, The sealing ring is made of rubber.

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