CN202301015U - Seal type tooth-shaped molded line screw - Google Patents
Seal type tooth-shaped molded line screw Download PDFInfo
- Publication number
- CN202301015U CN202301015U CN2011204194756U CN201120419475U CN202301015U CN 202301015 U CN202301015 U CN 202301015U CN 2011204194756 U CN2011204194756 U CN 2011204194756U CN 201120419475 U CN201120419475 U CN 201120419475U CN 202301015 U CN202301015 U CN 202301015U
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- China
- Prior art keywords
- screw rod
- screw
- tooth
- profile
- molded lines
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a seal type tooth-shaped molded line screw suitable for a twin-screw pump. The seal type tooth-shaped molded line screw includes a main screw and an accessorial screw, wherein end cross-sections of the main screw and the accessorial screw are formed by bottom circles, pitch circles and outer circles; tooth-shaped molded lines of the main screw and the accessorial screw are meshed and identical; each tooth-shaped molded line is formed by four part in sequence, namely an arc (ab), a cycloid (bc), another arc (cd) and an oblique line (de); a C point on the main screw is conjugated with the cycloid (bc) on the accessorial screw; the arcs (ab) and the bottom circles of the screws are tangent on a shaft cross-section; the arcs (cd) and the oblique lines (de) are butted with the outer circles of the screws. The seal type tooth-shaped molded lines are simple and smooth, and improve the mechanical efficiency of the screw pump as well as the volume fraction of the screw pump.
Description
Technical field
The utility model relates to a kind of twin-screw, relates in particular to a kind of designing technique of two screw pump sealed type profile of tooth molded lines.
Background technique
Screw pump is the device that is applied to carry thick liquid in the industries such as oil, chemical industry, papermaking or generally adopts with granular liquid; Screw pump is by being meshing with each other of principal and subordinate's screw rod and closely cooperating of screw rod and lining inwall; Between pump intake and exhaust port; Will be separated into one or more seal spacies, utilize the revolution of screw rod to realize suction liquid again.In the existing technology, because the Applicable scope of pump is different, thereby the profile of tooth molded lines of screw pump screw rod is also had nothing in common with each other, A type, Type B, C type, D type etc. are arranged, there is following problem in these profile of tooth molded lines in the utilization process:
1, meshing relation is complicated, and profile of tooth engagement molded lines is by forming more than two sections and three sections, and principal and subordinate's screw spiral head number, helical pitch etc. have relevant provisions etc., thereby have directly reduced the screw rod mechanism working efficiency;
2, on the screw axis cross section, the profile of tooth molded lines is connected not slick and sly with screw rod cylindrical, end circle, is unfavorable for that the hardening heat of screw rod is handled;
3, the adjacent sheaves after the screw engages communicates with each other because of the leakage triangle defective of profile of tooth itself, thereby has reduced the volumetric efficiency of pump;
4, in utilization because of the existence of screw rod working clearance, tooth meshing relation and design substantial deviation, thus reduced the design performance index of screw rod.
The model utility content
The purpose of the utility model is to overcome shortcoming of the prior art; A kind of novel seal type profile of tooth molded lines that has is provided; Can make the tooth meshing relation tight, the teeth groove that the engagement back forms is not connected, thereby guarantees the design performance index and the volumetric efficiency that improves pump of screw rod.
To achieve these goals; The utility model adopts following technological scheme to realize; A kind of sealed type profile of tooth molded lines screw rod comprises master and slave screw rod, and said master and slave screw rod end section is made up of end circle, pitch circle and cylindrical; The profile of tooth molded lines of master and slave screw rod is identical, and described profile of tooth molded lines is made up of circular arc ab, cycloid bc, circular arc cd and oblique line de four partial continuous; C point on the described driving screw and cycloid bc conjugation from the screw rod; Circle is tangent on shaft section at the bottom of described circular arc ab and the screw rod; Described circular arc cd docks with the screw rod cylindrical respectively with oblique line de.
The profile of tooth molded lines of described master and slave screw rod is symmetrical.
The angle of described oblique line de and screw rod cylindrical is 3 ~ 10 °.
The radius of described circular arc ab is 0.2 ~ 0.4mm, and the radius of circular arc cd is 0.3 ~ 0.5mm.
Adopt the profile of tooth molded lines screw rod of the utility model, owing to ab line, cd line, de line, guarantee screw rod under the working clearance, the profile of tooth of master and slave screw rod is not destroyed when engagement; Because c point on the driving screw and the cycloid bc conjugation from the screw rod; 2 of c, b are again on same radial line; Thereby the formed helicoid of generation line that makes cycloid bc make the screw rod profile not only meets the theory of engagement; And, make screw pump reach sealing effect better in use, make two screw pump really become the sealed type displacement pump.Circle is crossing and tangent on shaft section at the bottom of circular arc ab and the screw rod, is convenient to the heat treatment of the flank of tooth.Necessary radial clearance was not destroyed the meshing relation of screw molded lines during circular arc ab, circular arc cd had realized turning round, and made screw rod profile and screw rod bottom, top slyness excessively simultaneously.Oblique line de and shortened the contact line length in screw rod cylindrical and hole with the angle of screw rod cylindrical, it is lubricated especially to mix the outside drainage of dry gas when carrying of being more convenient for of defeated operating mode admittedly in gas-liquid, can greatly improve the runnability of pump.
The utility model compared with prior art has significant advantage:
1, improved the plot ratio of screw pump;
2, the utility model profile of tooth molded lines is simple, slick and sly, has improved the mechanical efficiency of screw pump;
3, the jointing place of cycloid bc and screw rod and cylindrical constitutes with circular arc cd and oblique line de, has reduced the friction area in screw rod and hole, has also increased to form the function that oil is carved;
4, the utility model can be used for the oil and gas multiphase flow under high gas content, the high pressure ratio operating mode.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify.
Fig. 1 is a sealed type tooth-shape structure shaft section schematic representation;
Fig. 2 is a sealed type profile of tooth molded lines curve synoptic diagram;
The master and slave screw rod profile of Fig. 3 mesh schematic representation.
Embodiment
Shown in Figure 1 is the sealed type tooth-shape structure shaft section schematic representation of screw rod, and the profile of tooth molded lines is made up of circular arc ab, cycloid bc, circular arc cd and oblique line de four partial continuous, and the profile of tooth molded lines is symmetrical.The jointing place of cycloid bc and screw rod and cylindrical constitutes with circular arc cd and oblique line de, has reduced the friction area in screw rod and hole, has also increased to form the function that oil is carved; Ab line, cd line, de line are guaranteed screw rod under the working clearance, and the bc line is not destroyed, thereby guarantee the stability of the running parameter of pump.
Fig. 2 is the sealed type profile of tooth molded lines curve synoptic diagram of screw rod; The profile of tooth molded lines is made up of circular arc ab, cycloid bc, circular arc cd and oblique line de four partial continuous, and identical by principal and subordinate's tooth shape of screw size, profile is identical; The condition that rotation direction meshes on the contrary; That confirms cycloid bc decides circle and moving circle, make c, b at 2 on same radial line, thereby the formed helicoid of generation line that makes cycloid bc make the screw rod profile not only meets the theory of engagement; And, make screw pump reach sealing effect better in use.The R2 radius of circular arc ab is 0.3mm, and the radius R 1 of circular arc cd is 0.5mm, and necessary radial clearance is not destroyed the meshing relation of screw rod in having realized turning round, and makes screw rod profile and screw rod bottom, top slyness excessively simultaneously.The angle theta of oblique line de and screw rod cylindrical is 8 °, has shortened the contact line length in screw rod cylindrical and hole, and the outside drainage when the mixed admittedly defeated operating mode of gas-liquid is more convenient for the dry gas conveying is lubricated, can greatly improve the runnability of pump.
Fig. 3 is master and slave screw rod profile mesh schematic representation, and its sealed type profile of tooth molded lines is meshing with each other and seals fully, does not form the leakage triangle between the adjacent sheaves.
Above embodiment is not limited only to the protection domain of the utility model, all based on the basic thought of the utility model and make amendment or the protection domain that all belongs to the utility model that changes in.
Claims (4)
1. sealed type profile of tooth molded lines screw rod; Comprise master and slave screw rod; Said master and slave screw rod end section is made up of end circle, pitch circle and cylindrical; The profile of tooth molded lines engagement of master and slave screw rod and identical, it is characterized in that: described profile of tooth molded lines is made up of circular arc ab, cycloid bc, circular arc cd and oblique line de four partial continuous; C point on the described driving screw and cycloid bc conjugation from the screw rod; Circle is tangent on shaft section at the bottom of described circular arc ab and the screw rod; Described circular arc cd docks with the screw rod cylindrical respectively with oblique line de.
2. a kind of sealed type profile of tooth molded lines screw rod according to claim 1, it is characterized in that: the profile of tooth molded lines of described master and slave screw rod is symmetrical.
3. a kind of sealed type profile of tooth molded lines screw rod according to claim 1, it is characterized in that: the angle of described oblique line de and screw rod cylindrical is 3 ~ 10 °.
4. a kind of sealed type profile of tooth molded lines screw rod according to claim 1, it is characterized in that: the radius of described circular arc ab is 0.2 ~ 0.4mm, the radius of circular arc cd is 0.3 ~ 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204194756U CN202301015U (en) | 2011-10-29 | 2011-10-29 | Seal type tooth-shaped molded line screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204194756U CN202301015U (en) | 2011-10-29 | 2011-10-29 | Seal type tooth-shaped molded line screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301015U true CN202301015U (en) | 2012-07-04 |
Family
ID=46369924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204194756U Expired - Fee Related CN202301015U (en) | 2011-10-29 | 2011-10-29 | Seal type tooth-shaped molded line screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202301015U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400913A (en) * | 2011-10-29 | 2012-04-04 | 黄山众拓工业泵制造有限公司 | Seal type tooth-form molded line screw rod |
-
2011
- 2011-10-29 CN CN2011204194756U patent/CN202301015U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400913A (en) * | 2011-10-29 | 2012-04-04 | 黄山众拓工业泵制造有限公司 | Seal type tooth-form molded line screw rod |
| CN102400913B (en) * | 2011-10-29 | 2014-04-16 | 黄山众拓工业泵制造有限公司 | Seal type tooth-form molded line screw rod |
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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: 20120704 Termination date: 20141029 |
|
| EXPY | Termination of patent right or utility model |