CN221278002U - Tandem type duplex pump - Google Patents
Tandem type duplex pump Download PDFInfo
- Publication number
- CN221278002U CN221278002U CN202323043089.3U CN202323043089U CN221278002U CN 221278002 U CN221278002 U CN 221278002U CN 202323043089 U CN202323043089 U CN 202323043089U CN 221278002 U CN221278002 U CN 221278002U
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- Prior art keywords
- pump
- vacuum pump
- oil
- oil pump
- vacuum
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- 239000003921 oil Substances 0.000 claims description 95
- 239000010687 lubricating oil Substances 0.000 claims description 11
- 239000010705 motor oil Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a tandem type duplex pump, which comprises an oil pump body, an oil pump rotor, a vacuum pump body, a vacuum pump rotor, a rotating shaft and a pump cover, wherein the oil pump body is provided with a plurality of oil pump grooves; the oil pump body is provided with an axle hole and an oil pump cavity, the bottom surface of the vacuum pump body seals the oil pump cavity, the vacuum pump body is provided with an axle hole and a vacuum pump cavity, the pump cover seals the vacuum pump cavity, and the pump cover is provided with a bearing mounting hole; the rotary shaft penetrates through the oil pump body, the oil pump rotor, the vacuum pump body, the vacuum pump rotor and the pump cover in sequence, interference fit is arranged between the rotary shaft and the oil pump rotor, spline fit is arranged between the rotary shaft and the vacuum pump rotor, the end part of the rotary shaft, which is positioned at one end of the oil pump body, extends outwards and is provided with a flat square for connecting external power, a bearing and a clamp spring are arranged after the other end of the rotary shaft penetrates through the vacuum pump rotor, and the bearing is arranged in a bearing mounting hole of the pump cover in an interference fit mode. Thus, the problem of difficult assembly of the rotating shaft is solved.
Description
Technical Field
The utility model belongs to the technical field of duplex pumps, and particularly relates to a tandem duplex pump.
Background
The traditional engine oil pump independently exists in the engine, and the mechanical vacuum pump is independently arranged on the outer surface of the engine and is not related to the engine.
The fixed-displacement oil pump is designed according to the maximum pressure flow requirement of the engine, but the engine does not need to provide the maximum pressure flow under most conditions, and the redundant flow of the oil pump is leaked back to cause certain idle work; the variable displacement oil pump changes the volume of the internal pump cavity according to the rotation speed of the engine, and compared with the traditional fixed displacement oil pump, the variable displacement oil pump can effectively reduce the power consumption of the engine.
Because both rotors on two sides of the oil pump and the vacuum pump need to be driven, if the oil pump and the vacuum pump are connected in series, the structure that the oil pump is in front and the vacuum pump is behind is generally adopted, the oil pump rotor and the rotating shaft adopt an interference fit connection mode, and at the moment, if the vacuum pump rotor is still connected with the rotating shaft by adopting the interference fit connection mode, the assembly difficulty and even the assembly failure can occur, so that the existing duplex pumps of the oil pump are all in single-rotation vacuum pump phases, but the single-rotation vacuum pump cannot bear high rotating speed.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a tandem type duplex pump with reasonable design and compact structure.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a serial duplex pump is formed by connecting an oil pump and a vacuum pump in series, and comprises an oil pump body, an oil pump rotor, a vacuum pump body, a vacuum pump rotor, a rotating shaft and a pump cover; the oil pump body is provided with an axle hole and an oil pump cavity, the bottom surface of the vacuum pump body seals the oil pump cavity, the vacuum pump body is provided with an axle hole and a vacuum pump cavity, the pump cover seals the vacuum pump cavity, and the pump cover is provided with a bearing mounting hole; the rotary shaft penetrates through the oil pump body, the oil pump rotor, the vacuum pump body, the vacuum pump rotor and the pump cover in sequence, interference fit is arranged between the rotary shaft and the oil pump rotor, spline fit is arranged between the rotary shaft and the vacuum pump rotor, the end part of the rotary shaft, which is positioned at one end of the oil pump body, extends outwards and is provided with a flat square for connecting external power, a bearing and a clamp spring are arranged after the other end of the rotary shaft penetrates through the vacuum pump rotor, and the bearing is arranged in a bearing mounting hole of the pump cover in an interference fit mode.
In the technical scheme, as one end of the rotating shaft is in interference fit with the oil pump rotor and the other end of the rotating shaft is in spline fit with the vacuum pump rotor, the problem of difficult assembly is solved, and meanwhile, in order to avoid axial movement between the rotating shaft and the vacuum pump rotor, a bearing and a clamp spring are arranged at the end part of the other end of the rotating shaft, and the bearing is arranged in a bearing mounting hole of the pump cover in an interference fit mode, so that the rotating shaft and the vacuum pump rotor can be ensured to freely rotate and cannot axially move.
In one embodiment, the bottom surface of the oil pump body is provided with an oil pump oil inlet, an oil pump oil outlet, a main oil duct interface and a vacuum pump air inlet; the engine oil pump body and the vacuum pump body are provided with mutually communicated air inlet channels, one end of each air inlet channel is connected with an air inlet of the vacuum pump, and the other end of each air inlet channel is communicated with a pump cavity of the vacuum pump; the lubricating oil duct is connected with the main oil duct interface at one end and is communicated to the bearing mounting hole of the pump cover at the other end. The oil pump oil inlet, the oil pump oil outlet, the main oil duct interface and the vacuum pump air inlet are arranged on the same installation plane, so that the processing and subsequent installation are convenient. One end of the lubricating oil duct is connected with the main oil duct interface, and the other end of the lubricating oil duct is communicated with the bearing mounting hole of the pump cover, so that lubrication can be provided for the bearing in the bearing mounting hole of the pump cover.
Further, the pump cover is provided with a vacuum pump exhaust port, the vacuum pump exhaust port is sealed through an elastic sheet, a limiting sheet is arranged above the elastic sheet, one ends of the elastic sheet and the limiting sheet are fixed on the pump cover through a screw, and one end of the limiting sheet is tilted upwards. The elastic piece is arranged at the exhaust port of the vacuum pump, so that external substances can be prevented from entering or flowing back into the vacuum cavity, the elastic piece can be outwards flushed away by the pressure in the pump cavity of the vacuum pump, the elastic piece can rebound and reset to seal the exhaust port of the vacuum pump after the pressure is released, the existence of the limiting piece can prevent the valve plate from being overlarge in bending amplitude when being flushed away, the service life is influenced, the effect of a flat pad can be achieved, the pressing force of the bolt on the elastic piece is uniform, stress concentration points are prevented from being generated, and the elastic piece is prevented from cracking or breaking in high-strength opening and closing.
In one embodiment, the oil pump is a vane type variable displacement pump.
In one embodiment, the vacuum pump is a multi-vane vacuum pump.
In one embodiment, the oil pump body, the vacuum pump body and the pump cover are fixedly connected through bolts.
Drawings
FIG. 1 is a schematic cross-sectional view of a tandem pump in accordance with an embodiment of the present utility model, shown in FIG. 1;
Fig. 2 is a schematic diagram 2 of an explosion structure of an oil pump in an embodiment of the present utility model;
FIG. 3 is a schematic diagram of an explosion structure of a vacuum pump according to an embodiment of the present utility model;
Fig. 4 is a schematic diagram of a bottom structure of a pump body of an oil pump according to an embodiment of the present utility model;
FIG. 5 is a schematic view showing the internal structure of a vacuum pump according to an embodiment of the present utility model;
fig. 6 is a schematic diagram of a lubrication oil passage structure of a vacuum pump according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram of an air inlet channel of a vacuum pump according to an embodiment of the present utility model;
fig. 8 is a schematic diagram of the external structure of the tandem pump according to the embodiment of the present utility model.
The reference numerals are:
1-an oil pump body 2-an oil pump rotor 3-an oil pump blade
4-Engine oil pump stator 5-vacuum pump body 6-vacuum pump rotor
7-Rotating shaft 8-pump cover 9-vacuum pump blade
10-Bearing 11-snap spring 12-spring piece
13-Limiting piece A-vacuum pump outlet B1-air inlet channel
B2-vacuum pump air inlet C-oil pump oil inlet D-oil pump oil outlet
F-Main oil gallery interface F F1-lubricating oil gallery.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model.
As shown in fig. 1 to 8, the tandem type duplex pump is formed by connecting a vane type oil pump and a multi-rotary vane vacuum pump in series, and comprises an oil pump body 1, an oil pump rotor 2, an oil pump vane 3, an oil pump stator 4, a vacuum pump body 5, a vacuum pump rotor 6, a rotating shaft 7, a pump cover 8, a vacuum pump vane 9, a bearing 10 and a clamp spring 11; the oil pump body 1 is provided with an axle hole and an oil pump cavity, the bottom surface of the vacuum pump body 5 seals the oil pump cavity, the vacuum pump body 5 is provided with the axle hole and the vacuum pump cavity, the pump cover 8 seals the vacuum pump cavity, and the pump cover 8 is provided with a bearing mounting hole; the rotating shaft 7 sequentially penetrates through the oil pump body 1, the oil pump rotor 2, the vacuum pump body 5, the vacuum pump rotor 6 and the pump cover 8, interference fit is formed between the rotating shaft 7 and the oil pump rotor 2, spline fit is formed between the rotating shaft 7 and the vacuum pump rotor 6, the end part of one end of the rotating shaft 7, which is positioned at the oil pump body 1, extends outwards and is provided with a flat square for connecting external power, after the other end of the rotating shaft 7 penetrates through the vacuum pump rotor 6, a bearing 10 and a clamp spring 11 are installed, the bearing 10 is installed in a bearing installation hole of the pump cover 8 in an interference fit mode, and the oil pump body 1, the vacuum pump body 5 and the pump cover are fixedly connected through bolts 8.
Because one end of the rotating shaft 7 is in interference fit with the oil pump rotor 1, and the other end of the rotating shaft is in spline fit with the vacuum pump rotor 6, the problem of difficult assembly is solved, meanwhile, in order to avoid axial movement between the rotating shaft 7 and the vacuum pump rotor 6, a bearing 10 and a clamp spring 11 are arranged at the end part of the other end of the rotating shaft 7, and the bearing 10 is arranged in a bearing mounting hole of the pump cover 8 in an interference fit manner, so that the rotating shaft 7 and the vacuum pump rotor 6 can be ensured to freely rotate and cannot axially move.
As shown in fig. 4 to 7, the bottom surface of the oil pump body 1 is provided with an oil pump oil inlet C, an oil pump oil outlet D, a main oil duct interface F and a vacuum pump air inlet B2; the engine oil pump body 1 and the vacuum pump body 5 are provided with an air inlet channel B1 which is communicated with each other, one end of the air inlet channel B1 is connected with a vacuum pump air inlet B2, and the other end of the air inlet channel B1 is communicated with a vacuum pump cavity; the oil pump body 1 and the vacuum pump body 5 are provided with lubricating oil channels F1 which are mutually communicated, one end of each lubricating oil channel F1 is connected with the main oil channel interface F, and the other end of each lubricating oil channel F1 is communicated with a bearing mounting hole of the pump cover 8. The oil pump oil inlet C, the oil pump oil outlet D, the main oil duct interface F and the vacuum pump air inlet B2 are arranged on the same installation plane, so that the processing and subsequent installation are facilitated. One end of the lubricating oil duct F1 is connected with the main oil duct interface F, and the other end of the lubricating oil duct F is communicated with a bearing mounting hole of the pump cover 8, so that lubrication can be provided for the bearing 10 in the bearing mounting hole of the pump cover 8.
As shown in fig. 8, a vacuum pump exhaust port a is arranged on the pump cover 8, the vacuum pump exhaust port a is sealed by a spring plate 12, a limiting plate 13 is arranged above the spring plate 12, one ends of the spring plate 12 and the limiting plate 13 are fixed on the pump cover 8 by a screw, and one end of the limiting plate 13 is tilted upwards. The elastic sheet 12 is arranged at the position of the vacuum pump exhaust port A, so that external substances can be prevented from entering or flowing back into the vacuum cavity, the external substances comprise oil or other substances, the pressure in the vacuum pump cavity can outwards flush the elastic sheet 12, the elastic sheet 12 can rebound to reset to seal the vacuum pump exhaust port A after the pressure is released, the existence of the limiting sheet 13 can prevent the valve sheet 12 from being overlarge in bending amplitude when the valve sheet 12 is flushed, the service life is influenced, the effect of a flat pad can be achieved, the pressing force of a bolt on the elastic sheet 12 is uniform, stress concentration points are prevented from being generated, and the elastic sheet 12 is prevented from cracking or breaking in high-strength opening and closing.
The foregoing embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.
In order to facilitate understanding of the improvements of the present utility model over the prior art, some of the figures and descriptions of the present utility model have been simplified and some other elements have been omitted for clarity, as will be appreciated by those of ordinary skill in the art.
Claims (6)
1. The utility model provides a tandem type duplex pump, is formed by oil pump and vacuum pump series connection, its characterized in that: the oil pump comprises an oil pump body (1), an oil pump rotor (2), a vacuum pump body (5), a vacuum pump rotor (6), a rotating shaft (7) and a pump cover (8); the oil pump body (1) is provided with an axle hole and an oil pump cavity, the bottom surface of the vacuum pump body (5) seals the oil pump cavity, the vacuum pump body (1) is provided with the axle hole and the vacuum pump cavity, the pump cover (8) seals the vacuum pump cavity, and the pump cover (8) is provided with a bearing mounting hole; the rotary shaft (7) sequentially penetrates through the oil pump body (1), the oil pump rotor (2), the vacuum pump body (5), the vacuum pump rotor (6) and the pump cover (8), interference fit is achieved between the rotary shaft (7) and the oil pump rotor (2), spline fit is achieved between the rotary shaft (7) and the vacuum pump rotor (6), the end portion of the rotary shaft (7) located at one end of the oil pump body (1) stretches out outwards and is provided with a flat square for connecting external power, a bearing (10) and a clamp spring (11) are installed after the other end of the rotary shaft (7) penetrates through the vacuum pump rotor (6), and the bearing (10) is installed in a bearing installation hole of the pump cover (8) in an interference fit mode.
2. The tandem twin pump of claim 1, wherein: an oil pump oil inlet (C), an oil pump oil outlet (D), a main oil duct interface (F) and a vacuum pump air inlet (B2) are arranged on the bottom surface of the oil pump body (1); an air inlet channel (B1) which is communicated with each other is arranged on the engine oil pump body (1) and the vacuum pump body (5), one end of the air inlet channel (B1) is connected with an air inlet (B2) of the vacuum pump, and the other end of the air inlet channel is communicated with a pump cavity of the vacuum pump; the lubricating oil duct (F1) which is mutually communicated is arranged on the engine oil pump body (1) and the vacuum pump body (5), one end of the lubricating oil duct (F1) is connected with the main oil duct interface (F), and the other end is communicated to a bearing mounting hole of the pump cover (8).
3. Tandem twin pump according to claim 1 or 2, characterized in that: the vacuum pump is characterized in that a vacuum pump exhaust port (A) is formed in the pump cover (8), the vacuum pump exhaust port (A) is sealed through an elastic sheet (12), a limiting sheet (13) is arranged above the elastic sheet (12), one ends of the elastic sheet (12) and the limiting sheet (13) are fixed on the pump cover (8) through a screw, and one end of the limiting sheet (13) is tilted upwards.
4. Tandem twin pump according to claim 1 or 2, characterized in that: the oil pump is a vane type variable pump.
5. Tandem twin pump according to claim 1 or 2, characterized in that: the vacuum pump is a multi-rotary-vane vacuum pump.
6. Tandem twin pump according to claim 1 or 2, characterized in that: the engine oil pump body (1), the vacuum pump body (5) and the pump cover (8) are fixedly connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323043089.3U CN221278002U (en) | 2023-11-10 | 2023-11-10 | Tandem type duplex pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323043089.3U CN221278002U (en) | 2023-11-10 | 2023-11-10 | Tandem type duplex pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221278002U true CN221278002U (en) | 2024-07-05 |
Family
ID=91706562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323043089.3U Active CN221278002U (en) | 2023-11-10 | 2023-11-10 | Tandem type duplex pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221278002U (en) |
-
2023
- 2023-11-10 CN CN202323043089.3U patent/CN221278002U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |