CN203835462U - Planet screw type machine - Google Patents
Planet screw type machine Download PDFInfo
- Publication number
- CN203835462U CN203835462U CN201420112681.6U CN201420112681U CN203835462U CN 203835462 U CN203835462 U CN 203835462U CN 201420112681 U CN201420112681 U CN 201420112681U CN 203835462 U CN203835462 U CN 203835462U
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- Prior art keywords
- planetary
- screw
- cylindrical body
- die cavity
- sun gear
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Abstract
The utility model discloses a planet screw type machine. The machine comprises a main case, a central sun wheel and at least one planet screw, wherein the main case consists of a cylinder body and end covers connected to the two ends of the cylinder body; the inner wall of the cylinder body is divided into a left part and a right part; a group of multi-head inner threads is arranged on each of the two parts; the spiral directions of the two groups of inner threads are opposite; the central sun wheel comprises a cylinder body and a central rotating shaft which is arranged on the main case by virtue of a bearing; at least one planet screw is eccentrically arranged in the central sun wheel and is connected with the inner threads of the main case in an engaged mode; two groups of single-head or multi-head outer threads are respectively arranged on the left part and the right part of the planet screw; the spiral directions of the two groups of outer threads are opposite and the outer threads are connected with the inner threads of the main case in an engaged mode. The planet screw type machine can be used as a compressor, a hydraulic pump or a pneumatic motor, and has the advantages of energy conservation and high efficiency.
Description
Technical field
The utility model relates to a kind of mechanical structure, relates in particular to a kind of planetary-screw formula machinery.
Background technique
The friction surface of existing single screw rod and double-screw compressor work is all High Rotation Speed, due to the effect of High Rotation Speed centrifugal force, makes its friction surface be difficult for forming effective oil film, and unstable wear, reduction of service life.In addition, the bearing of double-screw compressor is bearing radial force not only, but also will bear huge axial pressure, and reduction of service life greatly.
The vane hydraulic of prior art or pneumatic motor, oil hydraulic pump, because its blade is to-and-fro motion in leaf groove, and loss of energy, unstable wear, in addition, its blade is easily stuck in blade groove and affect work.
The piston type hydraulic pumps of prior art, hydraulic motor structure complexity, bulky, effect is lower than too.
Model utility content
The purpose of this utility model, the problem existing in order to solve above-mentioned prior art exactly, provides a kind of planetary-screw formula machinery.
To achieve these goals, the utility model has adopted following technological scheme: a kind of planetary-screw formula machinery, and it comprises:
Casing, is comprised of cylindrical body and the end cap that is connected to cylindrical body two ends, and the inwall of cylindrical body is divided into left and right two-part, and two-part are respectively established the internal thread of one group of bull, and the flute profile of screw thread is matrix, and the Hand of spiral of two groups of internal threads is contrary;
Center sun gear, comprises cylindrical body and central rotating shaft, and central rotating shaft is arranged on casing by bearing;
At least one planetary-screw, it is eccentrically set in the sun gear of center and with the engagement of casing internal thread and is connected, left and right two-part of planetary-screw are respectively provided with the outside thread of one group of single head or bull, and the flute profile of screw thread is convex, and the two groups of contrary incorporating mill shell of externally threaded Hand of spiral internal thread engagements are connected.
The middle part of described casing cylindrical body is provided with import and is communicated with inner chamber, and two ends are respectively equipped with outlet and are communicated with inner chamber.
In the cylindrical body of described sun gear, be provided with for the die cavity of planetary-screw is installed, planetary-screw is arranged in this die cavity and is movably arranged on cylindrical body by bearing.
The circumference of the circumference of described planetary-screw outside thread path and casing internal thread path is tangent and tangent with the cylindrical circumference of sun gear, and the circumference in the circumference in the large footpath of planetary-screw outside thread and the large footpath of casing internal thread is tangent.
The surface composition of the periphery of described sun gear and casing internal thread path the screw type space of two groups of relative sealings.
Described planetary-screw is one, and in the cylindrical body of described sun gear, bias is provided with one for the die cavity of planetary-screw is installed, and planetary-screw is arranged in this die cavity and is movably arranged on cylindrical body by bearing.
Described planetary-screw is two, and the bilateral symmetry of the inherent central rotating shaft of cylindrical body of described sun gear is provided with two for the die cavity of planetary-screw is installed, and two planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
Described planetary-screw is three, in the cylindrical body of described sun gear, along the circumferential of central rotating shaft, is evenly provided with three for the die cavity of planetary-screw is installed, and three planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
Described planetary-screw is four, in the cylindrical body of described sun gear, along the circumferential of central rotating shaft, is evenly provided with four for the die cavity of planetary-screw is installed, and four planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
Between a number of casing internal thread, externally threaded number of planetary-screw, the large footpath of casing internal thread, the externally threaded large footpath of planetary-screw, by following relation, set:
The externally threaded large footpath of large footpath/planetary-screw of externally threaded number * casing internal thread of number=planetary-screw of casing internal thread.
Planetary-screw formula machinery of the present utility model not only can be used as compressor, also can be used as oil hydraulic pump or pneumatic motor.When as oil hydraulic pump or pneumatic motor, when the liquid of high pressure or gas are entered seal space and arrived planetary-screw by import, it acts on power on planetary-screw and can promote planetary-screw and move along the molded line of casing internal thread, thereby drives sun gear to rotate.There is energy-conservation, efficient advantage.
Accompanying drawing explanation
Fig. 1 is the axial cross-sectional configuration schematic diagram of the utility model planetary-screw formula machinery.
Fig. 2 is the radially cross-sectional configuration schematic diagram of the utility model planetary-screw formula machinery.
Fig. 3 is the broken section structural representation of inner member of the present utility model.
Fig. 4 is radially broken section structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Referring to Fig. 1, coordinate referring to Fig. 2, Fig. 3, Fig. 4.Planetary-screw formula machinery of the present utility model, comprises casing 1, center sun gear 2 and at least one planetary-screw 3.Planetary-screw 3 in the present embodiment is two.
Casing 1 is comprised of cylindrical body 11 and the end cap 12 that is connected to cylindrical body two ends, and the inwall of cylindrical body is divided into left and right two-part, and two-part are respectively established the internal thread of one group of bull, and the flute profile of screw thread is matrix, and the Hand of spiral of two groups of internal threads is contrary.The middle part of casing cylindrical body is provided with import 13 and is communicated with inner chamber, and two ends are respectively equipped with outlet 14 and are communicated with inner chamber.
Center sun gear 2 comprises cylindrical body 21 and central rotating shaft 22, and central rotating shaft 22 is arranged on casing by bearing 23.In the cylindrical body 21 of sun gear, be provided with for the die cavity of planetary-screw is installed, planetary-screw 3 is arranged in this die cavity and is movably arranged on cylindrical body by bearing 31.
At least one planetary-screw 3 is eccentrically set in center sun gear 2 and with the engagement of casing internal thread and is connected, left and right two-part of planetary-screw are respectively provided with the outside thread of one group of single head or bull, the flute profile of screw thread is convex, and the two groups of contrary incorporating mill shell of externally threaded Hand of spiral internal thread engagements are connected.
The circumference of the circumference of planetary-screw outside thread path and casing internal thread path is tangent and tangent with the cylindrical circumference of sun gear, and the circumference in the circumference in the large footpath of planetary-screw outside thread and the large footpath of casing internal thread is tangent.
The surface composition of the periphery of sun gear and casing internal thread path the screw type space of two groups of relative sealings.
Planetary-screw 3 in the utility model can be one, two, three or four (the present embodiment is two), when planetary-screw is one, in the cylindrical body of sun gear, bias is provided with one for the die cavity of planetary-screw is installed, and planetary-screw is arranged in this die cavity and is movably arranged on cylindrical body by bearing.
When planetary-screw is two, the bilateral symmetry of the inherent central rotating shaft of the cylindrical body of sun gear is provided with two for the die cavity of planetary-screw is installed, and two planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
When planetary-screw is three, in the cylindrical body of described sun gear, along the circumferential of central rotating shaft, be evenly provided with three for the die cavity of planetary-screw is installed, three planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
When planetary-screw is four, in the cylindrical body of sun gear, along the circumferential of central rotating shaft, be evenly provided with four for the die cavity of planetary-screw is installed, four planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
Planetary-screw formula machinery of the present utility model not only can be used as compressor, also can be used as oil hydraulic pump or pneumatic motor.
The working principle of planetary-screw formula machinery of the present utility model is:
When the rotor combining when center sun gear and planetary-screw fits into casing, because sun gear has sealed the spiral space of casing internal thread, and the screw thread of planetary-screw and casing internal thread are supporting sealed engagement, when sun gear rotates, planetary-screw is except circling with it, and self also will be the rotation of mutually doing to roll in meshing screw type wire casing advances with casing internal thread.Thereby realize the compression of medium or pump function.
A little features of planting implementation methods are, owing to adopting, at two of parts, designing two groups of meshing pairs that Hand of spiral is contrary, so, the axial force acting on planetary-screw and sun gear can be cancelled out each other, in addition, because planetary-screw is assemblied on the axial eccentric position of sun gear, when sun gear High Rotation Speed, planetary-screw produces centrifugal force, and the meshing pair of planetary-screw is when the airtight space propultion of screw type, can produce centripetal force, offset suffered centrifugal action, make the major-minor shaft strength on unit rationally increase its working life.
In order to keep planetary-screw with the mutual meshing rotation of casing internal thread in the situation that, the mutual axle phase displacement of unlikely generation, and planetary-screw rotates in the mode of rolling in casing, we follow following relation:
Externally threaded number of number=planetary-screw of casing internal thread * (the externally threaded large footpath of large footpath/planetary-screw of casing internal thread).
Example: casing is 5 internal threads, large footpath is 100 millimeters, according to this formula, in the situation that complementing one another, the pitch of planetary-screw and casing internal thread pitch designs externally threaded number of planetary-screw and large footpath, if we design planetary-screw outside thread head, number is 1 stature, according to formula, the externally threaded large footpath of planetary-screw is exactly 20 millimeters so.If we design respectively planetary-screw outside thread is 2 statures, 3 statures, 4 statures, so according to formula, the large footpath of planetary-screw outside thread is respectively 40 millimeters, 60 millimeters and 80 millimeters.
Claims (10)
1. a planetary-screw formula machinery, is characterized in that, comprising:
Casing, is comprised of cylindrical body and the end cap that is connected to the simplified two ends of circle, and the inwall of cylindrical body is divided into left and right two-part, and two-part are respectively established the internal thread of one group of bull, and the flute profile of screw thread is matrix, and the Hand of spiral of two groups of internal threads is contrary;
Center sun gear, comprises cylindrical body and central rotating shaft, and central rotating shaft is arranged on casing by bearing;
At least one planetary-screw, it is eccentrically set in the sun gear of center and with the engagement of casing internal thread and is connected, left and right two-part of planetary-screw are respectively provided with the outside thread of one group of single head or bull, and the flute profile of screw thread is convex, and the two groups of contrary incorporating mill shell of externally threaded Hand of spiral internal thread engagements are connected.
2. planetary-screw formula machinery as claimed in claim 1, is characterized in that: the middle part of described casing cylindrical body is provided with import and is communicated with inner chamber, and two ends are respectively equipped with outlet and are communicated with inner chamber.
3. planetary-screw formula machinery as claimed in claim 1, is characterized in that: in the cylindrical body of described sun gear, be provided with for the die cavity of planetary-screw is installed, planetary-screw is arranged in this die cavity and is movably arranged on cylindrical body by bearing.
4. planetary-screw formula as claimed in claim 1 is mechanical, it is characterized in that: the circumference of the circumference of described planetary-screw outside thread path and casing internal thread path is tangent and tangent with the cylindrical circumference of sun gear, and the circumference in the circumference in the large footpath of planetary-screw outside thread and the large footpath of casing internal thread is tangent.
5. planetary-screw formula as claimed in claim 1 machinery, is characterized in that: the surface composition of the periphery of described sun gear and casing internal thread path the screw type space of two groups of relative sealings.
6. planetary-screw formula as claimed in claim 1 is mechanical, it is characterized in that: described planetary-screw is one, in the cylindrical body of described sun gear, bias is provided with one for the die cavity of planetary-screw is installed, and planetary-screw is arranged in this die cavity and is movably arranged on cylindrical body by bearing.
7. planetary-screw formula as claimed in claim 1 is mechanical, it is characterized in that: described planetary-screw is two, the bilateral symmetry of the inherent central rotating shaft of cylindrical body of described sun gear is provided with two for the die cavity of planetary-screw is installed, and two planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
8. planetary-screw formula as claimed in claim 1 is mechanical, it is characterized in that: described planetary-screw is three, in the cylindrical body of described sun gear, along the circumferential of central rotating shaft, be evenly provided with three for the die cavity of planetary-screw is installed, three planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
9. planetary-screw formula as claimed in claim 1 is mechanical, it is characterized in that: described planetary-screw is four, in the cylindrical body of described sun gear, along the circumferential of central rotating shaft, be evenly provided with four for the die cavity of planetary-screw is installed, four planetary-screws are separately positioned in each die cavity and are movably arranged on cylindrical body by bearing.
10. planetary-screw formula as claimed in claim 1 is mechanical, it is characterized in that: between a number of casing internal thread, externally threaded number of planetary-screw, the large footpath of casing internal thread, the externally threaded large footpath of planetary-screw, by following relation, set:
The externally threaded large footpath of large footpath/planetary-screw of externally threaded number * casing internal thread of number=planetary-screw of casing internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112681.6U CN203835462U (en) | 2014-03-12 | 2014-03-12 | Planet screw type machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112681.6U CN203835462U (en) | 2014-03-12 | 2014-03-12 | Planet screw type machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835462U true CN203835462U (en) | 2014-09-17 |
Family
ID=51513318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420112681.6U Expired - Fee Related CN203835462U (en) | 2014-03-12 | 2014-03-12 | Planet screw type machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI722958B (en) * | 2019-11-08 | 2021-03-21 | 肯岳亞股份有限公司 | Servo electric cylinder, servo electric press thereof, and method of replacing feed rod and sub rod thereof |
-
2014
- 2014-03-12 CN CN201420112681.6U patent/CN203835462U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI722958B (en) * | 2019-11-08 | 2021-03-21 | 肯岳亞股份有限公司 | Servo electric cylinder, servo electric press thereof, and method of replacing feed rod and sub rod thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20150312 |
|
| EXPY | Termination of patent right or utility model |