CN205225666U - Externally -engaged gear pump - Google Patents
Externally -engaged gear pump Download PDFInfo
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- CN205225666U CN205225666U CN201520866155.3U CN201520866155U CN205225666U CN 205225666 U CN205225666 U CN 205225666U CN 201520866155 U CN201520866155 U CN 201520866155U CN 205225666 U CN205225666 U CN 205225666U
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- major axis
- protecgulum
- minor axis
- parts
- gland
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Abstract
The utility model discloses an externally -engaged gear pump, including the pump body, hou gai, protecgulum and screw, the pump body, back lid and protecgulum pass through screw fixed connection in proper order, be provided with the gland in the lid of back, the gland is equipped with more than one, the gland is held with back lid card and is connected, gland one side is provided with major axis and minor axis respectively, be provided with the gear pair between major axis and the minor axis, major axis and minor axis pass through the gear pair and connect, major axis and minor axis both ends are provided with bearing respectively, major axis and minor axis rotate with bearing respectively to be connected, be provided with between the bearing and reveal the passageway, protecgulum one side is provided with the seal receptacle, seal receptacle and protecgulum fixed connection, be provided with the sealing ring in the seal receptacle, this externally -engaged gear pump is simple as a result, and operating stability is high, and long service life is sealed effectual.
Description
Technical field
The utility model relates to a kind of pump housing technical field, particularly relates to a kind of external gear pump.
Background technique
Gear pump relies on the swept volume formed between pumping cylinder and engaging gear to change and the mobile rotary pump carried liquid or make it supercharging.Form two enclosed spaces by two gears, the pump housing and front and rear covers, when pinion rotation, the volume in the space of the side that is out of gear is large from little change, forms vacuum, is sucked by liquid, and liquid from diminishing greatly, and is clamp-oned in pipeline and gone by the volume in the space of gears meshing side.Suction chamber and discharge side lean on the line of contact of two gears to separate.The pressure of the exhaust port of gear pump depends on the size of pump discharge place resistance completely.
The concept of gear pump is very simple, namely its most citation form is exactly that two measure-alike gears engage each other rotation in a close-fitting housing, the inner classes of this housing is like the figure of eight, and two gears are contained in the inside, and the external diameter of gear and both sides and housing closely cooperate.The material coming from extruder enters in the middle of two gears at suction port, and is full of this space, along with the rotation of tooth is along housing motion, finally discharges when two tooth engagements.At term, gear pump is also positive displacement devices, and namely as the piston in a cylinder barrel, when a tooth enters the fluid space of another tooth, liquid is just mechanically squeezed and ejects.Because liquid is incompressible, so liquid and tooth just can not occupy the same space at one time, like this, liquid has just been excluded.Due to the continuous engagement of tooth, this phenomenon is just continuous in generation, and thus also just provide a continuous eliminating amount at delivery side of pump, pump is often gone around, and the amount of discharge is the same.Along with the rotation incessantly of live axle, pump also just displacement fluids incessantly.The flow of pump is directly relevant with the rotating speed of pump.
In fact, the fluid loss of seldom amount is had in pump, this makes the operational efficiency of pump not reach 100%, because these fluids are used to lubricating bearings and gear both sides, and the pump housing also must not blind-mate, therefore fluid 100% ground can not be made to discharge, so a small amount of fluid loss is inevitable from outlet.But pump still can run well, concerning most of extruded material, still can reach the efficiency of 93% ~ 98%.
Gear wear in current existing gear pump is comparatively serious, and cause sealability to decline, working life is not long.
Model utility content
It is simple that the technical problems to be solved in the utility model is to provide a kind of result, and operation stability is high, long service life, the external gear pump of good sealing effect.
For solving the problem, the utility model adopts following technological scheme:
A kind of external gear pump, comprises the pump housing, bonnet, protecgulum and screw, the described pump housing, bonnet and protecgulum are fixedly connected sequentially by screw, gland is provided with in described bonnet, described gland is provided with more than one, described gland holds with bonnet and is connected, described gland side is respectively arranged with major axis and minor axis, gear pair is provided with between described major axis and minor axis, described major axis is connected by gear pair with minor axis, described major axis and minor axis two ends are respectively arranged with needle bearing, described major axis and minor axis are rotationally connected with needle bearing respectively, leakage is provided with between described needle bearing, described protecgulum side is provided with sealing seat, described sealing seat is fixedly connected with protecgulum, is provided with seal ring in described sealing seat, and described gear pair is made up of following material by mass fraction proportioning: nitriding steel 55-60 part, limestone 5-10 part, cast alumin(i)um 2-8 part, Antaciron 6-10 part, carbon dust 2-5 part, manganese dioxide 1-3 part, silica 1-2 parts, bentonite clay 0.5-1 part, bismuth oxide 3-5 part, boric oxide 1-2 part and antimony trioxide 2-4 part.
Further, described major axis end is provided with key.
Further, described key is connected with major axis interference fit.
Further, straight pin is provided with bottom the described pump housing.
Further, the described pump housing, bonnet are connected by straight pin successively with protecgulum.
A manufacture method for the gear pair of external gear pump, comprises the following steps:
1) nitriding steel 55-60 part, limestone 5-10 part, cast alumin(i)um 2-8 part, Antaciron 6-10 part, carbon dust 2-5 part, manganese dioxide 1-3 part, silica 1-2 parts, bentonite clay 0.5-1 part, bismuth oxide 3-5 part, boric oxide 1-2 part and antimony trioxide 2-4 part are dropped into maintenance 850 DEG C-900 DEG C melting 25-30 minute in smelting furnace, obtain melt, for subsequent use;
2) gear pair blank is obtained by step 1) gained melt cast to mould, for subsequent use;
3) by step 2) gained gear pair blank rolls-gear shaping technique through turning-Re, then carries out the quenching of flank of tooth high frequency induction and resistance heating, final refine benchmark and fine finishing profile of tooth.
The beneficial effects of the utility model are: the major axis of setting and minor axis can driven gear pair engage, make pump housing inner volume large from little change, form vacuum, sucked by liquid, straight pin keeps the pump housing, bonnet and protecgulum easy for installation, and seal ring keeps good sealing effect, leakage can regulate pump housing air pressure balance when not using, the material that gear pair adopts and processing technology can keep having high wear resistance and high-fatigue strength, and keep long service life, stability is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural drawing of a kind of external gear pump of the present utility model.
Embodiment
Embodiment 1
Consult shown in Fig. 1, a kind of external gear pump, comprise the pump housing 1, bonnet 2, protecgulum 3 and screw 4, the described pump housing 1, bonnet 2 and protecgulum 3 are fixedly connected sequentially by screw 4, gland 5 is provided with in described bonnet 2, described gland 5 is provided with more than one, described gland 5 holds with bonnet 2 and is connected, described gland 5 side is respectively arranged with major axis 6 and minor axis 7, gear pair 8 is provided with between described major axis 6 and minor axis 7, described major axis 6 is connected by gear pair 8 with minor axis 7, described major axis 6 and minor axis 7 two ends are respectively arranged with needle bearing 9, described major axis 6 and minor axis 7 are rotationally connected with needle bearing 9 respectively, leakage 10 is provided with between described needle bearing 9, described protecgulum 3 side is provided with sealing seat 11, described sealing seat 11 is fixedly connected with protecgulum 3, is provided with seal ring 12 in described sealing seat 11, and described gear pair 8 is made up of following material by mass fraction proportioning: nitriding steel 55 parts, 5 parts, limestone, cast alumin(i)um 2 parts, Antaciron 6 parts, carbon dust 2 parts, manganese dioxide 1 part, silica 1 part, bentonite clay 0.5 part, bismuth oxide 3 parts, boric oxide 1 part and antimony trioxide 2 parts.
Described major axis 7 end is provided with key 13.
Described key 13 is connected with major axis 7 interference fit.
Straight pin 14 is provided with bottom the described pump housing 1.
The described pump housing 1, bonnet 2 are connected by straight pin 14 successively with protecgulum 3.
A manufacture method for the gear pair 8 of external gear pump, comprises the following steps:
1) 850 DEG C-900 DEG C melting 25-30 minute are kept by nitriding steel 55 parts, 5 parts, limestone, cast alumin(i)um 2 parts, Antaciron 6 parts, carbon dust 2 parts, manganese dioxide 1 part, silica 1 part, bentonite clay 0.5 part, bismuth oxide 3 parts, boric oxide 1 part and antimony trioxide 2 parts of input smelting furnaces, obtain melt, for subsequent use;
2) gear pair blank is obtained by step 1) gained melt cast to mould, for subsequent use;
3) by step 2) gained gear pair blank rolls-gear shaping technique through turning-Re, then carries out the quenching of flank of tooth high frequency induction and resistance heating, final refine benchmark and fine finishing profile of tooth.
Embodiment 2
Consult shown in Fig. 1, a kind of external gear pump, comprise the pump housing 1, bonnet 2, protecgulum 3 and screw 4, the described pump housing 1, bonnet 2 and protecgulum 3 are fixedly connected sequentially by screw 4, gland 5 is provided with in described bonnet 2, described gland 5 is provided with more than one, described gland 5 holds with bonnet 2 and is connected, described gland 5 side is respectively arranged with major axis 6 and minor axis 7, gear pair 8 is provided with between described major axis 6 and minor axis 7, described major axis 6 is connected by gear pair 8 with minor axis 7, described major axis 6 and minor axis 7 two ends are respectively arranged with needle bearing 9, described major axis 6 and minor axis 7 are rotationally connected with needle bearing 9 respectively, leakage 10 is provided with between described needle bearing 9, described protecgulum 3 side is provided with sealing seat 11, described sealing seat 11 is fixedly connected with protecgulum 3, is provided with seal ring 12 in described sealing seat 11, and described gear pair 8 is made up of following material by mass fraction proportioning: nitriding steel 57.5 parts, 7.5 parts, limestone, cast alumin(i)um 5 parts, Antaciron 8 parts, carbon dust 3.5 parts, manganese dioxide 2 parts, silica 1 .5 part, bentonite clay 0.75 part, bismuth oxide 4 parts, boric oxide 1.5 parts and antimony trioxide 3 parts.
Described major axis 7 end is provided with key 13.
Described key 13 is connected with major axis 7 interference fit.
Straight pin 14 is provided with bottom the described pump housing 1.
The described pump housing 1, bonnet 2 are connected by straight pin 14 successively with protecgulum 3.
A manufacture method for the gear pair 8 of external gear pump, comprises the following steps:
1) 850 DEG C-900 DEG C melting 25-30 minute are kept by nitriding steel 57.5 parts, 7.5 parts, limestone, cast alumin(i)um 5 parts, Antaciron 8 parts, carbon dust 3.5 parts, manganese dioxide 2 parts, silica 1 .5 part, bentonite clay 0.75 part, bismuth oxide 4 parts, boric oxide 1.5 parts and antimony trioxide 3 parts of input smelting furnaces, obtain melt, for subsequent use;
2) gear pair blank is obtained by step 1) gained melt cast to mould, for subsequent use;
3) by step 2) gained gear pair blank rolls-gear shaping technique through turning-Re, then carries out the quenching of flank of tooth high frequency induction and resistance heating, final refine benchmark and fine finishing profile of tooth.
Embodiment 3
Consult shown in Fig. 1, a kind of external gear pump, comprise the pump housing 1, bonnet 2, protecgulum 3 and screw 4, the described pump housing 1, bonnet 2 and protecgulum 3 are fixedly connected sequentially by screw 4, gland 5 is provided with in described bonnet 2, described gland 5 is provided with more than one, described gland 5 holds with bonnet 2 and is connected, described gland 5 side is respectively arranged with major axis 6 and minor axis 7, gear pair 8 is provided with between described major axis 6 and minor axis 7, described major axis 6 is connected by gear pair 8 with minor axis 7, described major axis 6 and minor axis 7 two ends are respectively arranged with needle bearing 9, described major axis 6 and minor axis 7 are rotationally connected with needle bearing 9 respectively, leakage 10 is provided with between described needle bearing 9, described protecgulum 3 side is provided with sealing seat 11, described sealing seat 11 is fixedly connected with protecgulum 3, is provided with seal ring 12 in described sealing seat 11, and described gear pair 8 is made up of following material by mass fraction proportioning: nitriding steel 60 parts, 10 parts, limestone, cast alumin(i)um 8 parts, Antaciron 10 parts, carbon dust 5 parts, manganese dioxide 3 parts, silica 2 parts, bentonite clay 1 part, bismuth oxide 5 parts, boric oxide 2 parts and antimony trioxide 4 parts.
Described major axis 7 end is provided with key 13.
Described key 13 is connected with major axis 7 interference fit.
Straight pin 14 is provided with bottom the described pump housing 1.
The described pump housing 1, bonnet 2 are connected by straight pin 14 successively with protecgulum 3.
A manufacture method for the gear pair 8 of external gear pump, comprises the following steps:
1) 850 DEG C-900 DEG C melting 25-30 minute are kept by nitriding steel 60 parts, 10 parts, limestone, cast alumin(i)um 8 parts, Antaciron 10 parts, carbon dust 5 parts, manganese dioxide 3 parts, silica 2 parts, bentonite clay 1 part, bismuth oxide 5 parts, boric oxide 2 parts and antimony trioxide 4 parts of input smelting furnaces, obtain melt, for subsequent use;
2) gear pair blank is obtained by step 1) gained melt cast to mould, for subsequent use;
3) by step 2) gained gear pair blank rolls-gear shaping technique through turning-Re, then carries out the quenching of flank of tooth high frequency induction and resistance heating, final refine benchmark and fine finishing profile of tooth.
The beneficial effects of the utility model are: the major axis of setting and minor axis can driven gear pair engage, make pump housing inner volume large from little change, form vacuum, sucked by liquid, straight pin keeps the pump housing, bonnet and protecgulum easy for installation, and seal ring keeps good sealing effect, leakage can regulate pump housing air pressure balance when not using, the material that gear pair adopts and processing technology can keep having high wear resistance and high-fatigue strength, and keep long service life, stability is high.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; any change of expecting without creative work or replacement; all should be encompassed within protection domain of the present utility model; therefore, the protection domain that protection domain of the present utility model should limit with claims is as the criterion.
Claims (5)
1. an external gear pump, it is characterized in that: comprise the pump housing, bonnet, protecgulum and screw, the described pump housing, bonnet and protecgulum are fixedly connected sequentially by screw, gland is provided with in described bonnet, described gland is provided with more than one, described gland holds with bonnet and is connected, described gland side is respectively arranged with major axis and minor axis, gear pair is provided with between described major axis and minor axis, described major axis is connected by gear pair with minor axis, described major axis and minor axis two ends are respectively arranged with needle bearing, described major axis and minor axis are rotationally connected with needle bearing respectively, leakage is provided with between described needle bearing, described protecgulum side is provided with sealing seat, described sealing seat is fixedly connected with protecgulum, seal ring is provided with in described sealing seat.
2. external gear pump as claimed in claim 1, is characterized in that: described major axis end is provided with key.
3. external gear pump as claimed in claim 2, is characterized in that: described key is connected with major axis interference fit.
4. external gear pump as claimed in claim 3, is characterized in that: be provided with straight pin bottom the described pump housing.
5. external gear pump as claimed in claim 4, is characterized in that: the described pump housing, bonnet are connected by straight pin successively with protecgulum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520866155.3U CN205225666U (en) | 2015-11-03 | 2015-11-03 | Externally -engaged gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520866155.3U CN205225666U (en) | 2015-11-03 | 2015-11-03 | Externally -engaged gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205225666U true CN205225666U (en) | 2016-05-11 |
Family
ID=55900735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520866155.3U Expired - Fee Related CN205225666U (en) | 2015-11-03 | 2015-11-03 | Externally -engaged gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205225666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989011A (en) * | 2017-05-11 | 2017-07-28 | 常州大学 | External toothing button pump |
-
2015
- 2015-11-03 CN CN201520866155.3U patent/CN205225666U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989011A (en) * | 2017-05-11 | 2017-07-28 | 常州大学 | External toothing button pump |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161103 |