CN208416923U - A kind of sealing structure of external gear rotary pump - Google Patents

Abstract

The utility model discloses a kind of sealing structures of external gear rotary pump, including shell and pressurization working lumen, the left end of shell is equipped with end cap, end cap is closely connect with shell, and the left side of end cap is equipped with bearing, and bearing is fixedly connected with end cap, the inside of bearing is equipped with transmission shaft, transmission shaft and bearing insertion connect, and the inside of shell is equipped with motor, and motor and shell insertion connect.The sealing structure of this kind of external gear rotary pump, the inside diameter of sealing ring is adapted with gear, even if will not fall off and deform easily under the operating of high speed again, its surface uses silica gel material, have the characteristics that waterproof sealing and heat resistance are good, Silica Surface is not easy to be scratched the abrasion that can also effectively prevent gear, prolong the service life, and balanced seal part be provided be conducive to increase oil sucting cavity and pumping cavity balanced area, the leakage of oil liquid is preferably prevented under the mutual cooperation of the two, sealing effect is greatly enhanced, not will cause the pollution of environment.

Description

A kind of sealing structure of external gear rotary pump

Technical field

The utility model relates to technical field, specially a kind of sealing structure of external gear rotary pump.

Background technique

The structure of gear pump is to be intermeshed the pump constituted together by two gears to become gear pump.It is by tooth The volume in the gear teeth meshing space of wheel changes to convey liquid, belongs to drum pump, the type of gear pump is more, can by engagement system It is divided into external gear rotary pump and crescent gear pump；Spur gear pump, helical-gear pump and herringbone can be divided into again by the tooth form of the gear teeth Gear pump etc..

But the manufacturing cost of existing external gear rotary pump is high, expensive, is not suitable for general factory or large-scale It promotes the use of, practical performance is poor, and external gear rotary pump weight weight and operation structure also is cumbersome, so that internal gear was born Load is big, and serious wear is caused after long time running, greatly shortens the service life of gear, thus easily causes oil liquid Leakage, poor sealing effect will also result in certain pollution to environment.

So how to design a kind of sealing structure of external gear rotary pump, becoming us will currently be solved the problems, such as.

Utility model content

The purpose of this utility model is to provide a kind of sealing structures of external gear rotary pump, to solve above-mentioned background technique The problem of operation structure of middle proposition is cumbersome and poor sealing effect.

To achieve the above object, the utility model provides the following technical solutions: a kind of sealing structure of external gear rotary pump, Including shell and pressurization working lumen, the left end of the shell is equipped with end cap, and the end cap is closely connect with shell, the end cap Left side is equipped with bearing, and the bearing is fixedly connected with end cap, and the inside of the bearing is equipped with transmission shaft, the transmission shaft and bearing Insertion connection, the inside of the shell are equipped with motor, and the motor and shell insertion are connected, set on the right side of the motor There is fuel tank, the fuel tank is arranged in parallel with motor, and the right end of the shell is equipped with safety valve and oil sealing, the safety valve and oil Envelope is fixedly connected with the casing, and the inside of the pressurization working lumen is equipped with the pump housing, driven gear and driving gear, the pump housing, Driven gear and driving gear, which are embedded in pressurization working lumen, to be connected, and the lower end of the pump housing is equipped with fuel sucking pipe, the fuel sucking pipe Be arranged in parallel with the pump housing, the lateral outer of the driven gear and driving gear is equipped with sealing ring, the sealing ring with it is driven Gear and driving gear fit closely, and the lower end of the pressurization working lumen is equipped with reflux road, the reflux road and pressurization working lumen Close connection, the left and right side of the fuel sucking pipe are equipped with balanced seal part, the balanced seal part and the fixed company of fuel sucking pipe It connects.

Further, the left end of the fuel sucking pipe is equipped with oil sucting cavity, and right end is equipped with pumping cavity, the oil sucting cavity and pressure oil Chamber is closely connect with fuel sucking pipe.

Further, the lateral outer of the driven gear and driving gear is evenly distributed with pinion gear, and the two is mutual Engagement.

Further, the surface of the safety valve is covered with groove.

Further, the oil sealing is in " cylinder " shape.

Further, the sealing ring is distributed in the figure of eight.

Compared with prior art, the utility model has the beneficial effects that the sealing structure of this kind of external gear rotary pump, uses Other the advantages of, former design unreasonable, gear pump by solving the problems, such as under the collective effect of shell and pressurization working lumen At work, driving gear can follow motor to rotate and driven gear is driven to rotate together, driving gear and driven gear side Equally distributed pinion gear is ceaselessly rotated and is intermeshed outside face, and the pump housing continuously can suck and be discharged oil liquid, greatly It improves work efficiency greatly, and the setting of motor alleviates the receiving load of internal gear, long time running will not cause Serious wear extends the service life of gear, and surface is provided with coil, and muting function is significant, easy to operate, convenient and efficient, The inside diameter of sealing ring is adapted with gear, even if will not fall off and deform easily under the operating of high speed again, surface is adopted With silica gel material, have the characteristics that waterproof sealing and heat resistance are good, Silica Surface, which is not easy to be scratched, can also effectively prevent tooth The abrasion of wheel, prolongs the service life, and balanced seal part be provided be conducive to increase oil sucting cavity and pumping cavity balanced area, two The leakage that oil liquid is preferably prevented under the mutual cooperation of person, greatly enhances sealing effect, not will cause the pollution of environment.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is the pressurization working lumen partial structural diagram of the utility model；

Fig. 3 is the sealing ring partial structural diagram of the utility model.

In figure: 1, shell, 2, end cap, 3, bearing, 4, transmission shaft, 5, motor, 6, fuel tank, 7, safety valve, 8, oil sealing, 9, Fuel sucking pipe, 10, reflux road, 11, pressurization working lumen, 12, the pump housing, 13, pumping cavity, 14, oil sucting cavity, 15, driven gear, 16, master Moving gear, 17, sealing ring, 18, balanced seal part.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-3 is please referred to, the utility model provides a kind of technical solution: a kind of sealing structure of external gear rotary pump, packet Shell 1 and pressurization working lumen 11 are included, the left end of shell 1 is equipped with end cap 2, and end cap 2 is closely connect with shell 1, and the left side of end cap 2 is set There is bearing 3, bearing 3 is fixedly connected with end cap 2, and the inside of bearing 3 is equipped with transmission shaft 4, and transmission shaft 4 and the insertion of bearing 3 connect, shell The inside of body 1 is equipped with motor 5, and motor 5 and the insertion of shell 1 connect, and the right side of motor 5 is equipped with fuel tank 6, fuel tank 6 and electricity Motivation 5 is arranged in parallel, and the right end of shell 1 is equipped with safety valve 7 and oil sealing 8, and safety valve 7 and oil sealing 8 are fixedly connected with shell 1, The inside of pressurization working lumen 11 is equipped with the pump housing 12, driven gear 15 and driving gear 16, the pump housing 12, driven gear 15 and driving tooth Wheel 16 is embedded in pressurization working lumen 11 and connects, and the lower end of the pump housing 12 is equipped with fuel sucking pipe 9, and fuel sucking pipe 9 is arranged in parallel with the pump housing 12, The lateral outer of driven gear 15 and driving gear 16 is equipped with sealing ring 17, sealing ring 17 and driven gear 15 and driving gear 16 fit closely, and the lower end of pressurization working lumen 11 is equipped with reflux road 10, and reflux road 10 is closely connect with pressurization working lumen 11, oil suction The left and right side of pipe 9 is equipped with balanced seal part 18, and balanced seal part 18 is fixedly connected with fuel sucking pipe 9.

Further, the left end of fuel sucking pipe 9 is equipped with oil sucting cavity 14 and right end is equipped with pumping cavity 13, oil sucting cavity 14 and pumping cavity 13 closely connect with fuel sucking pipe 9, during operation since intermeshing two gears gradually disengage, pressurization working lumen 11 Volume also constantly increase and form partial vacuum, therefore the oil liquid in fuel tank 6 is under the action of external atmospheric pressure, by inhaling Oil pipe 9 follows gear to be rotated, finally oil liquid into oil sucting cavity 14 after the inter-tooth slots on 11 surface of pressurization working lumen are filled up It takes in the pumping cavity 13 on right side, satisfies the use demand.

Further, the lateral outer of driven gear 15 and driving gear 16 is evenly distributed with pinion gear, and the two is mutual Engagement, at work, driving gear 16 can follow motor 5 to rotate and driven gear 15 is driven to rotate together gear pump, actively Gear 16 and the equally distributed pinion gear of 15 lateral outer of driven gear are ceaselessly rotated and are intermeshed, and the pump housing 12 can continuously not Disconnected sucking and discharge oil liquid, greatly improves work efficiency, and the receiving that the setting of motor 5 alleviates internal gear is negative Lotus, long time running will not lead to serious wear, extend the service life of gear, and surface is provided with coil, muting function Significantly, easy to operate, it is convenient and efficient.

Further, the surface of safety valve 7 is covered with groove, and safety valve 7 is a kind of overload protection, when the pressure value of discharge is super When crossing defined pressure value, conveying liquid can open safety valve 7 automatically, return to highly pressurised liquid in reflux road 10, infinite reflux Pressure is good, if the practical operation pressure of the pump housing 12 is lower than maximum row pressure allowable, safety valve 7 will be according to practical operation pressure Power adjusts sealed pressure, can bearing strength and functional reliability it is high, it is to increase and operator that surface distribution is fluted The contact area of member's palm, plays anti-skidding effect.

Further, oil sealing 8 is in " cylinder " shape, and oil sealing 8 is the mechanical organ for oil sealing, transmission shaft 4 with need to lubricate Component be isolated, have oil resistant, heat-resisting performance, can either effectively prevent the leakage of oil liquid, and can effectively prevent ash Dirt or other pollutants enter the pump housing 12, have the function of duplicate protection.

Further, sealing ring 17 is distributed in the figure of eight, and the inside diameter of sealing ring 17 is adapted with gear, even if again It will not fall off and deform easily under the operating of high speed, surface uses silica gel material, has waterproof sealing and heat resistance good The characteristics of, Silica Surface is not easy to be scratched the abrasion that can also effectively prevent gear, prolongs the service life, and balanced seal part 18 Be provided be conducive to increase oil sucting cavity 14 and pumping cavity 13 balanced area, preferably prevent oil liquid under the mutual cooperation of the two Leakage, greatly enhances sealing effect, not will cause the pollution of environment.

Working principle: first checking whether the sealing structure of external gear rotary pump is perfect using preceding, if asking without any Topic can be used, firstly, gear pump is at work, driving gear 16 can follow motor 5 to rotate and drive driven gear 15 1 Rotation is played, driving gear 16 and the equally distributed pinion gear of 15 lateral outer of driven gear are ceaselessly rotated and are intermeshed, and are pumped Body 12 continuously can suck and be discharged oil liquid, then, during operation since intermeshing two gears gradually take off It opens, the volume of pressurization working lumen 11 also constantly increases and forms partial vacuum, therefore the oil liquid in fuel tank 6 is in external atmospheric pressure Under the action of, enter oil sucting cavity 14 by fuel sucking pipe 9, the inter-tooth slots on 11 surface of pressurization working lumen are filled up is revolved followed by gear Turn, finally oil liquid is taken in the pumping cavity 13 on right side, then, under the mutual cooperation of sealing ring 17 and balance sealing element 18 more The good leakage for preventing oil liquid, greatly enhances sealing effect, followed by, when the pressure value of discharge is more than defined pressure value, Conveying liquid can open safety valve 7 automatically, return to highly pressurised liquid in reflux road 10, infinite reflux pressure is good.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. a kind of sealing structure of external gear rotary pump, including shell (1) and pressurization working lumen (11), it is characterised in that: described The left end of shell (1) is equipped with end cap (2), and the end cap (2) closely connect with shell (1), and the left side of the end cap (2) is equipped with axis It holds (3), the bearing (3) is fixedly connected with end cap (2), and the inside of the bearing (3) is equipped with transmission shaft (4), the transmission shaft (4) it is connected with bearing (3) insertion, the inside of the shell (1) is equipped with motor (5), and the motor (5) and shell (1) are embedding Enter connection, the right side of the motor (5) is equipped with fuel tank (6), and the fuel tank (6) is arranged in parallel with motor (5), the shell (1) right end is equipped with safety valve (7) and oil sealing (8), and the safety valve (7) and oil sealing (8) are fixedly connected with shell (1), institute The inside for stating pressurization working lumen (11) is equipped with the pump housing (12), driven gear (15) and driving gear (16), the pump housing (12), from Moving gear (15) and driving gear (16), which are embedded in pressurization working lumen (11), to be connected, and the lower end of the pump housing (12) is equipped with oil suction It manages (9), the fuel sucking pipe (9) is arranged in parallel with the pump housing (12), outside the side of the driven gear (15) and driving gear (16) Portion is equipped with sealing ring (17), and the sealing ring (17) fits closely with driven gear (15) and driving gear (16), described The lower end of pressurization working lumen (11) is equipped with reflux road (10), and the reflux road (10) closely connect with pressurization working lumen (11), institute The left and right side for stating fuel sucking pipe (9) is equipped with balanced seal part (18), and the balanced seal part (18) and fuel sucking pipe (9) are fixed Connection.

2. a kind of sealing structure of external gear rotary pump according to claim 1, it is characterised in that: the fuel sucking pipe (9) Left end be equipped with oil sucting cavity (14), and right end is equipped with pumping cavity (13), and the oil sucting cavity (14) and pumping cavity (13) are and oil suction (9) are managed closely to connect.

3. a kind of sealing structure of external gear rotary pump according to claim 1, it is characterised in that: the driven gear (15) and the lateral outer of driving gear (16) is evenly distributed with pinion gear, and the two is intermeshed.

4. a kind of sealing structure of external gear rotary pump according to claim 1, it is characterised in that: the safety valve (7) Surface be covered with groove.

5. a kind of sealing structure of external gear rotary pump according to claim 1, it is characterised in that: the oil sealing (8) is in " cylinder " shape.

6. a kind of sealing structure of external gear rotary pump according to claim 1, it is characterised in that: the sealing ring (17) It is distributed in the figure of eight.