CN216381843U - External gear pump using logarithmic spiral molded line gear - Google Patents
External gear pump using logarithmic spiral molded line gear Download PDFInfo
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- CN216381843U CN216381843U CN202123227677.3U CN202123227677U CN216381843U CN 216381843 U CN216381843 U CN 216381843U CN 202123227677 U CN202123227677 U CN 202123227677U CN 216381843 U CN216381843 U CN 216381843U
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Abstract
The utility model discloses an external gear pump using a logarithmic spiral molded line gear, and relates to the technical field of gear pumps; the pump comprises a pump body, wherein the pump body is divided into a suction cavity and a discharge cavity by a pair of meshed driving gears and driven gears, the suction cavity is communicated with a suction inlet arranged at one end of the pump body, and the discharge cavity is communicated with a discharge outlet arranged at one end of the pump body; the driving gear and the driven gear are both integrated injection molding gears with logarithmic spiral tooth shapes. The external gear pump using the logarithmic spiral type line gear provided by the utility model has small meshing friction loss, and is beneficial to increasing the running stability of the gear pump, reducing noise and prolonging the service life.
Description
Technical Field
The utility model relates to the technical field of gear pumps, in particular to an external gear pump using a logarithmic spiral profile gear.
Background
The external gear pump is a rotary pump which utilizes the continuous volume change between external gear and suction cavity and discharge sealing cavity of pump body to make the liquid move from suction cavity to discharge cavity or make it be pressurized.
Involute gears have mature hobbing and gear shaping processes and are easier to manufacture, so that involute gears in the gears used in modern times account for the absolute majority, while cycloid gears and circular arc gears are less in application. External gear pumps also employ involute gears. The involute gear only has pure rolling at the reference circle in a standard gear and an equal-profile gear pair, has large meshing friction loss, and is easy to generate abrasion and reduce the efficiency in the application of gear pump products.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an external gear pump using a logarithmic spiral type line gear, which aims to solve the problems in the prior art, the logarithmic spiral gear is theoretically always in pure rolling in the meshing process, the meshing friction loss is small, the operation stability of the gear pump is favorably improved, the noise is reduced, and the service life is prolonged.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides an external gear pump using a logarithmic spiral molded line gear, which comprises a pump body, wherein the inside of the pump body is divided into a suction cavity and a discharge cavity by a pair of meshed driving gears and driven gears, the suction cavity is communicated with a suction inlet arranged at one end of the pump body, and the discharge cavity is communicated with a discharge outlet arranged at one end of the pump body; the driving gear and the driven gear are both integrated injection molding gears with logarithmic spiral tooth shapes; the external gear pump utilizes the continuous volume change between the external gear and the suction cavity and the discharge cavity of the pump body to make the liquid move from the suction cavity to the discharge cavity or pressurize the liquid, when the gear rotates, the volume of the space at the gear disengagement side is increased from small to large to form vacuum to suck the liquid, and the volume of the space at the gear engagement side is decreased from large to small to squeeze the liquid into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears; logarithmic spiral: the moving direction of the moving point always keeps a moving point track with a constant angle beta with the pole diameter, and the moving point track is called a logarithmic spiral (also called an equiangular spiral); the logarithmic spiral gear is theoretically in pure rolling all the time in the meshing process, the meshing friction loss is small, the operation stability of the gear pump is favorably improved, the noise is reduced, and the service life is prolonged.
Optionally, the pump body includes a front pump cover, a middle pump body and a rear pump body which are fixedly and hermetically connected in sequence, the driving gear and the driven gear are arranged in the middle pump body, the driving gear and the driven gear divide a cavity in the middle pump body into the suction cavity and the discharge cavity, and the suction inlet and the discharge outlet are arranged at one end of the front pump cover.
Optionally, the side walls of the suction inlet and the discharge outlet are provided with internal threads.
Optionally, the driving gear is fixedly sleeved on the driving gear shaft, the driven gear is fixedly sleeved on the driven gear shaft, one end of the driven gear shaft is connected with the front pump cover through a sliding shaft sleeve, the other end of the driven gear shaft is connected with the rear pump body through a sliding shaft sleeve, one end of the driving gear shaft is connected with the front pump cover through a sliding shaft sleeve, the other end of the driving gear shaft is connected with the rear pump body through two sliding shaft sleeves, and the other end of the driving gear shaft penetrates through the rear pump body and then is connected with a driving device in a transmission mode.
Optionally, a sealing ring groove is formed in one end, close to the middle pump body, of the front pump cover, and a sealing ring used for forming axial static sealing by contacting with the middle pump body is arranged in the sealing ring groove.
Optionally, a seal ring groove is formed in one end, close to the middle pump body, of the rear pump body, and a seal ring used for forming axial static seal by contacting with the middle pump body is arranged in the seal ring groove.
Compared with the prior art, the utility model has the following technical effects:
the gear die with the logarithmic spiral tooth profile is manufactured by adopting a linear cutting process based on an injection molding or powder metallurgy process, and the logarithmic spiral gear meeting the design requirement can be obtained without adjusting a special cutter and setting parameters of a machine tool; the logarithmic spiral gear is theoretically in pure rolling all the time in the meshing process, the meshing friction loss is small, the operation stability of the gear pump is favorably improved, the noise is reduced, and the service life is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of an external gear pump of the present invention using logarithmic spiral-type line gears;
FIG. 2 is a side schematic view of an external gear pump of the present invention using logarithmic spiral-type line gears;
FIG. 3 is a schematic diagram of the configuration of the intake and discharge chambers of an external gear pump of the present invention using logarithmic spiral-type gears;
wherein, 1 is the front pump cover, 2 is the middle pump body, 3 is the back pump body, 4 is the driving gear, 5 is the driven gear, 6 is the driving gear axle, 7 is the driven gear axle, 8 is the sliding shaft sleeve, 9 is the suction inlet, 10 is the discharge port, 11 is the suction chamber, 12 is the discharge chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model aims to provide an external gear pump using a logarithmic spiral type line gear, which aims to solve the problems in the prior art, the logarithmic spiral gear is theoretically always in pure rolling in the meshing process, the meshing friction loss is small, the operation stability of the gear pump is favorably improved, the noise is reduced, and the service life is prolonged.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The utility model provides an external gear pump using logarithmic spiral type line gears, as shown in fig. 1, fig. 2 and fig. 3, comprising a pump body, wherein the pump body is divided into a suction cavity 11 and a discharge cavity 12 by a pair of meshed driving gears and driven gears, the suction cavity 11 is communicated with a suction inlet 9 arranged at one end of the pump body, and the discharge cavity 12 is communicated with a discharge outlet 10 arranged at one end of the pump body; the driving gear 4 and the driven gear 5 are both integrated injection molding gears with logarithmic spiral tooth shapes; the external gear pump utilizes the continuous volume change between the external gear and the suction cavity 11 and the discharge cavity 12 of the pump body to make the liquid move from the suction cavity 11 to the discharge cavity 12 or pressurize the liquid, when the gear rotates, the volume of the space at the gear disengagement side is increased from small to large to form vacuum to suck the liquid, and the volume of the space at the gear engagement side is decreased from large to small to squeeze the liquid into the pipeline. The suction chamber 11 and the discharge chamber 12 are separated by the meshing line of two gears; the moving direction of the moving point always keeps a moving point track with a constant angle beta with the pole diameter, and the moving point track is called a logarithmic spiral (also called an equiangular spiral); the logarithmic spiral gear is theoretically in pure rolling all the time in the meshing process, the meshing friction loss is small, the operation stability of the gear pump is favorably improved, the noise is reduced, and the service life is prolonged.
Specifically, the pump body includes the preceding pump cover 1, the well pump body 2 and the back pump body 3 of fixed sealing connection in proper order through fixing bolt, and the one end that preceding pump cover 1 is close to well pump body 2 is equipped with the seal ring groove, and the seal ring inslot is provided with and is used for constituting the sealing washer of axial static seal with well pump body 2 contact. One end of the rear pump body 3 close to the middle pump body 2 is provided with a sealing ring groove, and a sealing ring which is used for forming axial static seal by contacting with the middle pump body 2 is arranged in the sealing ring groove; the driving gear 4 and the driven gear 5 are arranged in the middle pump body 2, the driving gear 4 and the driven gear 5 divide a cavity in the middle pump body 2 into a suction cavity 11 and a discharge cavity 12, the suction inlet 9 and the discharge outlet 10 are arranged at one end of the front pump cover 1, and the side walls of the suction inlet 9 and the discharge outlet 10 are provided with internal threads, so that an external pipeline is convenient to connect. The driving gear shaft 6 is fixedly sleeved with the driving gear 4, the driven gear shaft 7 is fixedly sleeved with the driven gear 5, one end of the driven gear shaft 7 is connected with the front pump cover 1 through the sliding shaft sleeve 8, the other end of the driven gear shaft is connected with the rear pump body 3 through the sliding shaft sleeve 8, one end of the driving gear shaft 6 is connected with the front pump cover 1 through the sliding shaft sleeve 8, the other end of the driving gear shaft 6 is connected with the rear pump body 3 through the two sliding shaft sleeves 8, the other end of the driving gear shaft 6 penetrates through the rear pump body 3 to be connected with a driving device in a transmission mode, the driving device is fixedly connected with the outer side of the rear pump body 3, and the driving motor can be adopted.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (6)
1. An external gear pump using a logarithmic spiral-type gear, characterized in that: the pump comprises a pump body, wherein the pump body is divided into a suction cavity and a discharge cavity by a pair of meshed driving gears and driven gears, the suction cavity is communicated with a suction inlet arranged at one end of the pump body, and the discharge cavity is communicated with a discharge outlet arranged at one end of the pump body; the driving gear and the driven gear are both integrated injection molding gears with logarithmic spiral tooth shapes.
2. The external gear pump using logarithmic spiral-type wire gear according to claim 1, characterized in that: the pump body is including fixed sealing connection's preceding pump cover, well pump body and back pump body in proper order, driving gear and driven gear set up in the well pump body, driving gear and driven gear will cavity in the well pump body is separated for suction chamber and discharge chamber, sunction inlet and discharge port are seted up in preceding pump cover one end.
3. The external gear pump using logarithmic spiral-type wire gear according to claim 2, characterized in that: the side walls of the suction inlet and the discharge outlet are provided with internal threads.
4. The external gear pump using logarithmic spiral-type wire gear according to claim 2, characterized in that: the driving gear fixing sleeve is arranged on the driving gear shaft, the driven gear fixing sleeve is arranged on the driven gear shaft, one end of the driven gear shaft is connected with the front pump cover through a sliding shaft sleeve, the other end of the driven gear shaft is connected with the rear pump body through a sliding shaft sleeve, one end of the driving gear shaft is connected with the front pump cover through a sliding shaft sleeve, the other end of the driving gear shaft is connected with the rear pump body through two sliding shaft sleeves, and the other end of the driving gear shaft penetrates through the rear pump body and then is connected with a driving device in a transmission mode.
5. The external gear pump using logarithmic spiral-type wire gear according to claim 2, characterized in that: and a sealing ring groove is formed in one end, close to the middle pump body, of the front pump cover, and a sealing ring which is used for being in contact with the middle pump body to form axial static sealing is arranged in the sealing ring groove.
6. The external gear pump using logarithmic spiral-type wire gear according to claim 2, characterized in that: and one end of the rear pump body, which is close to the middle pump body, is provided with a sealing ring groove, and a sealing ring which is used for being in contact with the middle pump body to form axial static seal is arranged in the sealing ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123227677.3U CN216381843U (en) | 2021-12-21 | 2021-12-21 | External gear pump using logarithmic spiral molded line gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123227677.3U CN216381843U (en) | 2021-12-21 | 2021-12-21 | External gear pump using logarithmic spiral molded line gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381843U true CN216381843U (en) | 2022-04-26 |
Family
ID=81236285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123227677.3U Active CN216381843U (en) | 2021-12-21 | 2021-12-21 | External gear pump using logarithmic spiral molded line gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381843U (en) |
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2021
- 2021-12-21 CN CN202123227677.3U patent/CN216381843U/en active Active
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