CN105370565A - Gear pump provided with safety valve - Google Patents
Gear pump provided with safety valve Download PDFInfo
- Publication number
- CN105370565A CN105370565A CN201510841614.7A CN201510841614A CN105370565A CN 105370565 A CN105370565 A CN 105370565A CN 201510841614 A CN201510841614 A CN 201510841614A CN 105370565 A CN105370565 A CN 105370565A
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- CN
- China
- Prior art keywords
- gear
- safety valve
- driving shaft
- shaft
- driven
- Prior art date
- 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.)
- Pending
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a gear pump provided with a safety valve. The gear pump comprises a driving shaft, a driven shaft and a pump shell. A cavity is formed in the pump shell. The driving shaft is sleeved with a driving gear. The driven shaft is sleeved with a driven gear. The driving gear is linearly engaged with the driven gear. The cavity is divided into a sucking cavity body and a discharging cavity body through the driving gear and the driven gear. A front end cover and a rear end cover are arranged on the two sides of the pump shell respectively. The front end cover is supported on the driving shaft and the driven shaft through bearings. The rear end cover is supported on the driving shaft and the driven shaft through bearings. The driving shaft stretches out of the front end cover and is connected with an external power shaft. A channel which is connected with the sucking cavity body and the discharging cavity body is formed in the pump shell. The safety valve is further arranged on the pump shell. The safety valve is communicated with the channel. The gear pump provided with the safety valve has the beneficial effects that once the discharging pressure exceeds the safe pressure in the using process, liquid pushes the safety valve open and flows back to the sucking cavity body, so that the working reliability of the whole device is guaranteed.
Description
Technical field
The present invention relates to a kind of gear pump with safety valve.
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.Gear pump forms two enclosed spaces by two gears, the pump housing and front and rear covers, when pinion rotation, the volume in space, side of being out of gear is large from little change, form vacuum, sucked by liquid, liquid, from diminishing greatly, is clamp-oned in pipeline and is 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, and the pressure of the exhaust port of gear pump depends on the size of pump discharge place resistance completely.
Gear pump is that liquid is discharged from exhaust port by the extruding force relying on meshed gears to produce, if this extruding force is excessive when exceeding authorized pressure value, will speed up the damage of gear, and then affects the reliability of gear pump work.
Summary of the invention
The invention is intended to provide a kind of gear pump with safety valve, with solve extruding force excessive time, the problem of gear pump functional reliability.
The gear pump of the band safety valve in this programme, comprise driving shaft, driven shaft and pump case, cavity is provided with in pump case, on driving shaft, cover has driving gear, on driven shaft, cover has driven gear, driving gear linearly engages with driven gear, cavity is divided into suction chamber and discharge side by driving gear and driven gear, pump case both sides are respectively equipped with front cover and rear end cover, front cover by bearings on driving shaft and driven shaft, rear end cover by bearings on driving shaft and driven shaft, driving shaft stretches out front cover and is connected with external impetus axle, pump case is provided with the passage connecting suction chamber and discharge side, pump case is also provided with safety valve, safety valve communicates with passage.
Working principle and the effect of this programme are: driving shaft rotates under the effect of outside line shaft, driving gear rotates with driving shaft, now move along contrary direction with the driven gear that driving gear engages, be positioned at the driving gear of suction chamber side and the tooth of driven gear is entered the state exiting engagement by engagement, now the space of suction chamber will increase, produce parital vacuum, liquid will enter suction chamber, along with the rotation of gear, the tooth being full of liquid leaves suction chamber, and transfer to discharge side along pump housing endophragm, when each tooth reenters engagement successively, the liquid of each between cog is by engaging-in gear extrusion and discharge from discharge side, driving gear and driven gear ceaselessly rotate, just can continuously suck and discharge liquid, safety pressure is exceeded once head pressure in using process, liquid will back down safety valve and flow back to suction chamber, thus ensure that the reliability of whole device work.
Further, front cover offers the groove for labyrinth seal, the structure of labyrinth seal is simple and sealing effect is better.
Further, bearing all adopts the deep groove ball bearing of band dual face seals lid, and the reliable performance of deep groove ball bearing, is widely used.
Further, driving shaft is connected with external impetus axle by flat key, and the keyway of flat key is easy to process, and the part convenient disassembly that flat key connects.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the sectional view of the A-A of Fig. 1 embodiment.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference character in Figure of description comprises: rear end cover 1, pump case 2, driven shaft 3, front cover 4, driving shaft 5, suction chamber 6, discharge side 7, driving gear 8, driven gear 9, safety valve 10.
Embodiment is substantially as shown in Figures 1 and 2: the gear pump of band safety valve, comprise driving shaft 5, driving shaft 5 axle stretch end offers flat key groove, driving shaft 5 is connected with external impetus axle by flat key, the left end of driving shaft 5 stretches in the through hole of front cover 4, the part that driving shaft 5 stretches into front cover 4 is from left to right provided with rear bearing successively, driving gear 8 and fore bearing, diameter driving shaft 5 being installed fore bearing and rear bearing place is less than the diameter installing driving gear 8 place, this structural design can limit the axial position of bearing on driving shaft 5, convenient installation, at driving shaft 5, driving gear 8 place is installed and also offers keyway, be connected by flat key between driving gear 8 with driving shaft 5.
Driven shaft 3 is provided with in the below of driving shaft 5, driven shaft 3 is divided into three sections, and wherein the more left and right two sections of diameters of intermediate section are comparatively large, and driven shaft 3 intermediate section is provided with driven gear 9, the position that left and right two sections of diameters are less is provided with bearing, and driven shaft 3 is connected with driven gear 9 by flat key.
Driving gear 8 and driven gear 9 are all arranged in the cavity of pump case 2, driving gear 8 and driven gear 9 linearly engage and cavity are divided into the suction chamber 6 in left side and the discharge side 7 on right side, the passage being communicated with suction chamber 6 and discharge side 7 is also provided with in the upside of pump case 2, on the right side of passage, be provided with safety valve 10, safety valve 10 place is also provided with adjusting screw.
Rear end cover 1 is provided with in the left side of pump case 2, rear end cover 1 is provided with two bearings, rear end cover 1 is connected with driving shaft 5 and driven shaft 3 respectively by two bearings, front cover 4 is provided with on the right side of pump case 2, front cover 4 is also provided with two bearings, front cover 4 is supported on driving shaft 5 and driven shaft 3 respectively by two bearings, and the position that driving shaft 5 stretches out on front cover 4 also offers the groove for labyrinth seal.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from structure of the present invention, some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.
Claims (4)
1. the gear pump with safety valve, it is characterized in that, comprise driving shaft, driven shaft and pump case, cavity is provided with in described pump case, on described driving shaft, cover has driving gear, on described driven shaft, cover has driven gear, described driving gear linearly engages with described driven gear, described cavity is divided into water-inlet cavity and water chamber by described driving gear and described driven gear, described pump case both sides are respectively equipped with front cover and rear end cover, described front cover by bearings on described driving shaft and described driven shaft, described rear end cover by bearings on described driving shaft and described driven shaft, described driving shaft stretches out described front cover and is connected with external impetus axle, described pump case is provided with the passage connecting described water-inlet cavity and described water chamber, described pump case is also provided with safety valve, described safety valve communicates with described passage.
2. the gear pump of band safety valve according to claim 1, is characterized in that: described front cover offers the groove for labyrinth seal.
3. the gear pump of band safety valve according to claim 2, is characterized in that: described bearing all adopts the deep groove ball bearing of band dual face seals lid.
4. the gear pump of band safety valve according to claim 3, is characterized in that: described driving shaft is connected with external impetus axle by flat key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510841614.7A CN105370565A (en) | 2015-11-28 | 2015-11-28 | Gear pump provided with safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510841614.7A CN105370565A (en) | 2015-11-28 | 2015-11-28 | Gear pump provided with safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105370565A true CN105370565A (en) | 2016-03-02 |
Family
ID=55373081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510841614.7A Pending CN105370565A (en) | 2015-11-28 | 2015-11-28 | Gear pump provided with safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612651A (en) * | 2018-07-13 | 2018-10-02 | 杜马司科学仪器（江苏）有限公司 | A kind of vacuum liquid discharging pump and vacuum distillation apparatus |
-
2015
- 2015-11-28 CN CN201510841614.7A patent/CN105370565A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612651A (en) * | 2018-07-13 | 2018-10-02 | 杜马司科学仪器（江苏）有限公司 | A kind of vacuum liquid discharging pump and vacuum distillation apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |