CN220890572U - Sealing structure of pump cavity - Google Patents
Sealing structure of pump cavity Download PDFInfo
- Publication number
- CN220890572U CN220890572U CN202321774041.7U CN202321774041U CN220890572U CN 220890572 U CN220890572 U CN 220890572U CN 202321774041 U CN202321774041 U CN 202321774041U CN 220890572 U CN220890572 U CN 220890572U
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- sealing
- threaded connection
- groove
- pump
- hole
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- 238000007789 sealing Methods 0.000 title claims abstract description 119
- 230000007704 transition Effects 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 2
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 210000004907 gland Anatomy 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the technical field of centrifugal pumps, in particular to a sealing structure of a pump cavity, which comprises the following components: the pump comprises a pump head, a central mounting hole, a sealing seat, a central sleeve hole and a pump shaft, wherein the sealing seat comprises a first sealing part and an outer baffle part arranged at the outer end of the first sealing part, the end part of the pump head is propped against the lower end face of the outer baffle part, the central mounting hole is sleeved on the outer side of the first sealing part, a first sealing groove is arranged below the outer baffle part at intervals, a first sealing ring is arranged in the first sealing groove, and a second sealing ring is arranged on the inner wall of the central sleeve hole. According to the utility model, the first sealing groove and the first sealing ring are arranged below the outer baffle part at intervals, and the chamfer angle of the end face of the pump head is separated from the first sealing ring up and down during assembly, so that the first sealing ring is always positioned in the first sealing groove, and the sealing performance is ensured.
Description
Technical Field
The utility model relates to the technical field of centrifugal pumps, in particular to a sealing structure of a pump cavity.
Background
In pump manufacturing, mechanical seal structures are widely arranged on pump shafts, such as rotating shafts in various volumetric pumps and centrifugal pumps for conveying media, so as to prevent materials in the pump bodies from flowing out of the pump bodies when the pumps work, namely, the pump shafts rotate relative to the pump bodies. The mechanical seal has the advantages of small friction power loss, long service life, no leakage and the like.
For example, chinese patent of publication No. CN213899376U discloses a sealing device for inner shaft of pump cavity of water pump, including stationary ring, stationary ring seat, moving ring seat, gland, moving ring seat, moving ring cover are located outside the pump shaft, are provided with first sealing washer between stationary ring seat and the gland, and first sealing washer includes hollow annular rubber ring, and the opening has been seted up to the lateral wall of rubber ring, and the inside of rubber ring is provided with annular wavy reed, because for the assembly of being convenient for, the gland need chamfer to the step position when processing, leads to first sealing washer can partly get into the space between chamfer and the stationary ring seat outer wall of gland step position at the assembly in-process, leads to first sealing washer deformation, has reduced sealing performance.
Disclosure of utility model
The utility model provides a sealing structure of a pump cavity for solving the technical problems, which avoids deformation of a sealing ring during assembly and improves sealing performance.
The above object of the present utility model is achieved by the following technical solutions: a sealing structure of a pump chamber, comprising: the pump head, set up central mounting hole on the pump head, set up sealing seat in the central mounting hole, axial run through central trepanning of sealing seat and wear to establish pump shaft in the central trepanning, the sealing seat includes first sealing part and sets up the outer fender portion of first sealing part outer end, the tip of pump head supports on the lower terminal surface of outer fender portion, the center mounting hole suit is in the first sealing part outside, the outside of first sealing part is provided with first seal groove, first seal groove interval sets up outer fender below, be provided with first sealing washer in the first seal groove, the inner wall of central trepanning is provided with the second sealing washer.
Preferably, the sealing seat further comprises a screw connection portion and a second sealing portion, the outer baffle portion, the first sealing portion, the screw connection portion and the second sealing portion are sequentially arranged along the axial direction, a threaded connection hole is formed below the central mounting hole, and the screw connection portion is in screw connection with the threaded connection hole.
Preferably, a second sealing groove is formed in the inner wall of the second sealing portion, and the second sealing ring is embedded in the second sealing groove.
Preferably, a first transition groove is arranged below the first sealing groove, and the first transition groove is arranged between the first sealing part and the screw connection part.
Preferably, a spring washer is arranged in the first transition groove, and the spring washer is respectively abutted against the end parts of the first sealing part and the threaded connection hole.
Preferably, the outer diameter of the screw connection portion is larger than the outer diameter of the second sealing portion, a gap is formed between the outer wall of the second sealing portion and the hole wall of the threaded connection hole, and a second transition groove is formed between the screw connection portion and the second sealing portion.
Preferably, a limit step is arranged at the lower end of the threaded connection hole, a filling ring is arranged between the limit step and the lower end face of the threaded connection part, and the filling ring is arranged in a gap between the outer wall of the second sealing part and the hole wall of the threaded connection hole.
The utility model has the beneficial effects that: according to the utility model, the first sealing groove and the first sealing ring are arranged below the outer baffle part at intervals, and the chamfer angle of the end face of the pump head is separated from the first sealing ring up and down during assembly, so that the first sealing ring is always positioned in the first sealing groove, and the sealing performance is ensured.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;
FIG. 2 is a schematic view showing the structure of a pump head according to embodiment 1 of the present utility model;
FIG. 3 is a schematic view showing the structure of a seal holder in embodiment 1 of the present utility model;
FIG. 4 is a schematic structural view of embodiment 2 of the present utility model;
in the figure: 1-pump head, 101-central mounting hole, 102-threaded connection hole, 103-limit step, 2-seal seat, 201-central sleeve hole, 202-outer baffle, 203-first seal, 204-screw connection, 205-second seal, 206-first seal groove, 207-second seal groove, 208-first transition groove, 209-second transition groove, 3-pump shaft, 4-first seal ring, 5-second seal ring, 6-spring washer, 7-packing ring.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model, may be made by those skilled in the art after reading the present specification, are only protected by patent laws within the scope of the claims of the present utility model.
Example 1:
As shown in fig. 1 and 2, a sealing structure of a pump chamber includes: the pump head 1, a central mounting hole 101 arranged on the pump head 1, a sealing seat 2 arranged in the central mounting hole 101, a central sleeve hole 201 axially penetrating the sealing seat 2 and a pump shaft 3 penetrating the central sleeve hole 201.
As shown in fig. 3, the seal seat 2 includes a first seal portion 203 and an outer baffle portion 202 disposed at an outer end of the first seal portion 203, an end portion of the pump head 1 abuts against a lower end surface of the outer baffle portion 202, the central mounting hole 101 is sleeved outside the first seal portion 203, a first seal groove 206 is disposed outside the first seal portion 203, the first seal groove 206 is disposed below the outer baffle portion 202 at intervals, and a first seal ring 4 is disposed in the first seal groove 206.
The sealing seat 2 further comprises a threaded connection portion 204 and a second sealing portion 205, the outer baffle portion 202, the first sealing portion 203, the threaded connection portion 204 and the second sealing portion 205 are sequentially arranged along the axial direction, a threaded connection hole 102 is formed below the central mounting hole 101, and the threaded connection portion 204 is in threaded connection with the threaded connection hole 102.
The inner wall of the central sleeve hole 201 is provided with a second sealing ring 5, and the second sealing ring 5 is located between the second sealing part 205 and the outer side of the pump shaft 3. The inner wall of the second sealing portion 205 is provided with a second sealing groove 207, and the second seal ring 5 is fitted into the second sealing groove 207.
A first transition groove 208 is provided below the first seal groove 206, and the first transition groove 208 is provided between the first seal portion 203 and the screw portion 204.
The outer diameter of the screw connection portion 204 is larger than that of the second sealing portion 205, a gap is formed between the outer wall of the second sealing portion 205 and the hole wall of the threaded connection hole 102, and a second transition groove 209 is formed between the screw connection portion 204 and the second sealing portion 205.
During assembly, the screw connection part 204 is screwed in the threaded connection hole 102, in the process, the first sealing part 203 is gradually sleeved in the central installation hole 101 until the lower end face of the outer baffle part 202 abuts against the upper end face of the first sealing part 203, and the first sealing ring 4 is limited in the first sealing groove 206 by the hole wall of the central installation hole 101; the chamfer size at the upper end face of the central sleeve hole 201 is smaller than the distance from the lower end face of the outer baffle part 202 to the first sealing groove 206, and the chamfer at the upper end face of the central sleeve hole 201 is positioned above the first sealing ring 4 after assembly and cannot contact with the first sealing ring, so that the first sealing ring 4 is prevented from entering a chamfer area to deform, and the sealing performance is ensured. The pump shaft 3 is then inserted into the central bore 201 such that the second seal ring 5 in the second seal groove 207 abuts the outside of the pump shaft 3.
Example 2:
As shown in fig. 4, a spring washer 6 is disposed in the first transition groove 208, and the spring washer 6 abuts against the first sealing portion 203 and the end of the threaded connection hole 102, respectively, to prevent loosening of the seal seat 2.
The lower extreme of threaded connection hole 102 is provided with spacing step 103, is provided with packing circle 7 between spacing step 103 and the lower terminal surface of spiro union portion 204, and packing circle 7 sets up in the space between the outer wall of second sealing portion 205 and the pore wall of threaded connection hole 102. The filling ring 7 is made of flexible rubber, and the inside of the filling ring is of a hollow structure. After assembly, the upper and lower ends of the filling ring 7 are pressed by the lower end surfaces of the screw connection parts 204 and the limit steps 103 to transversely deform, so that the gap between the outer walls of the two sealing parts 205 and the wall of the threaded connection hole 102 is filled, and the sealing performance is further improved.
Claims (7)
1. A sealing structure of a pump chamber, comprising: pump head (1), set up center mounting hole (101) on pump head (1), set up sealing seat (2), the axial of running through in center mounting hole (101) center trepanning (201) of sealing seat (2) and wear to establish pump shaft (3) in center trepanning (201), a serial communication port, sealing seat (2) include first sealing portion (203) and set up outer fender portion (202) of first sealing portion (203) outer end, the tip of pump head (1) supports on the lower terminal surface of outer fender portion (202), center mounting hole (101) suit is in the outside of first sealing portion (203), the outside of first sealing portion (203) is provided with first seal groove (206), first seal groove (206) interval sets up outside fender portion (202) below, be provided with first sealing washer (4) in first seal groove (206), the inner wall of center trepanning (201) is provided with second sealing washer (5).
2. A pump chamber sealing structure according to claim 1, wherein: the sealing seat (2) further comprises a threaded connection portion (204) and a second sealing portion (205), the outer baffle portion (202), the first sealing portion (203), the threaded connection portion (204) and the second sealing portion (205) are sequentially arranged along the axial direction, a threaded connection hole (102) is formed in the lower portion of the central mounting hole (101), and the threaded connection portion (204) is in the threaded connection hole (102) in a threaded mode.
3. A pump chamber sealing structure according to claim 2, wherein: the inner wall of the second sealing part (205) is provided with a second sealing groove (207), and the second sealing ring (5) is embedded into the second sealing groove (207).
4. A pump chamber sealing structure according to claim 3, wherein: a first transition groove (208) is arranged below the first sealing groove (206), and the first transition groove (208) is arranged between the first sealing part (203) and the threaded connection part (204).
5. The sealing structure of a pump chamber according to claim 4, wherein: a spring washer (6) is arranged in the first transition groove (208), and the spring washer (6) is respectively abutted against the end parts of the first sealing part (203) and the threaded connection hole (102).
6. A pump chamber sealing structure according to claim 2, wherein: the external diameter of the screw connection part (204) is larger than the external diameter of the second sealing part (205), a gap is formed between the external wall of the second sealing part (205) and the hole wall of the threaded connection hole (102), and a second transition groove (209) is arranged between the screw connection part (204) and the second sealing part (205).
7. The pump chamber sealing structure according to claim 6, wherein: the lower extreme of threaded connection hole (102) is provided with spacing step (103), be provided with between the lower terminal surface of spacing step (103) and spiro union portion (204) and fill circle (7), fill circle (7) set up in the space between the outer wall of second sealing portion (205) with the pore wall of threaded connection hole (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321774041.7U CN220890572U (en) | 2023-07-07 | 2023-07-07 | Sealing structure of pump cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321774041.7U CN220890572U (en) | 2023-07-07 | 2023-07-07 | Sealing structure of pump cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220890572U true CN220890572U (en) | 2024-05-03 |
Family
ID=90838912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321774041.7U Active CN220890572U (en) | 2023-07-07 | 2023-07-07 | Sealing structure of pump cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220890572U (en) |
-
2023
- 2023-07-07 CN CN202321774041.7U patent/CN220890572U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |