CN202468295U - Internal gear pumps suitable for forward and reverse operation - Google Patents

Abstract

The utility model discloses be fit for just contrary moving crescent gear pump, it includes a pump body, a pump upper cover, a set of device and a set of stabilising arrangement of actuating, should actuate device and this stabilising arrangement holding between this pump body and this pump upper cover, this pump body is equipped with a first room of holding, this first room of holding is equipped with several location convex part, this stabilising arrangement then is equipped with an elastic component and a top trigger piece, with the help of the effect of this elastic component and this top trigger piece, make this stabilising arrangement can absorb the vibration that is transmitted to an internal tooth ring spare by this external tooth axle spare of actuating the device, the effect with this location convex part is assisted again simultaneously, make the internal tooth ring spare in the pump when just contrary moving, can not produce the side-to-side beat, all can remain stable and do not make crescent gear pump vibration.

Description

The crescent gear pump that is fit to just contrary running

Technical field

The utility model mainly is to disclose a kind of pump, refers in particular to a kind of crescent gear pump that is fit to just contrary running.

Background technique

Pump is a kind ofly can liquid flowed to eminence by lower or is delivered at a distance or become the machinery of high pressure by low pressure by a place, and the difference according to its operating principle can be divided into centrifugal, reciprocating type and rotary three types.

Revolving pump has a fixing shell; Its pattern comprises Runner assemblies such as gear, cam; The flow channel space of set inside provides liquid to go out because of force feed after just the conversion of negative pressure is captured during the pump running; This kind pump volume is light and handy, only needs very little space just can be installed in the machinery, and is very convenient in the use.

Along with popularizing of environmental consciousness, many machineries all are designed with effect of saving energy, reduce the waste of energy; For crescent gear pump, can turn to or the energy-conservation purpose of pump is reached in the change of rotating speed by the control servomotor, but servomotor turns to or rotation speed change can cause the strong oscillation phenomenon of pump generation itself; Running for a long time; Will cause damage to pump body and internal component thereof, so how can effectively solve oscillation phenomenon is current important problem.

Therefore, the creator creates a kind of crescent gear pump that is fit to just contrary running that can address the above problem really.

The model utility content

The technical problem of the utility model institute desire solution is to be the disappearance that exists to existing technology, and a kind of crescent gear pump that is fit to just contrary running is provided, and makes the crescent gear pump can runs steadily.

Be to realize that above-mentioned purpose, the technology side that the utility model provides do. a kind of just being fit to against the crescent gear pump that turns round,, it includes: a pump body, this pump body is provided with one first room, and this first room is provided with at least one positioning convex portion; A pump loam cake, this pump loam cake is incorporated into this pump body, is covered with an axle spare positioning hole on this pump, and this part positioning hole is communicated in the both ends of the surface of this pump loam cake; An actuator, this actuator are placed in this pump body, and this actuator comprises an internal tooth ring and an external tooth axle spare; This internal tooth ring is placed in this first room; The outside circumferentia of this internal tooth ring contacts with this positioning convex portion, and this external tooth axle spare is placed in this internal tooth ring, and this external tooth axle spare partly meshes with this internal tooth ring; One end of this external tooth axle spare is arranged in this part positioning hole of pump loam cake, and this external tooth axle spare can connect transmission device; A stabilizer; This stabilizer is arranged in this first room of this pump body and between this actuator; This stabilizer is provided with a stabilization; This stabilization places between this first room and this internal tooth ring, and this stabilization can absorb the vibration of this internal tooth ring, makes the crescent gear pump can runs steadily.

Further, this technological scheme can be:

This stabilization can be placed an elastic component, and an end of this elastic component places one of this pump body to hold in the hole, and the other end then places on the receiving part of this stabilization.

The stability of several chip junction, the junction can be combined with a number of top valve member, the valve member so that the top of the stabilizer can be more firmly placed on the actuator mounted catching rabbits with the pump body between the first chamber .

This positioning convex portion is provided with a ring surface of contact, and the curvature of this ring surface of contact is identical with the outside circumferentia of this internal tooth ring, and the outside ring-type face portion of this internal tooth ring is fitted on this ring surface of contact.

This pump body is provided with a filler member, and this filler member is placed in first room, and this external tooth axle spare contacts with this filler member one edge surface, and this internal tooth ring then contacts with another edge surface of this filler member.

Be covered with a joining hole on this pump, this joining hole places an end of a cotter pin, and this cotter pin is provided with a conflict face, and this conflict face can limit the position of this filler member.

This pump body is provided with one first side pressure piece, is covered with one second side pressure piece on this pump, and this first side pressure piece and sheathed this external tooth axle spare of this second side pressure piece are clamped on this internal tooth ring up and down in this first room of this pump body simultaneously.

This first side pressure piece is provided with a central siphon positioning hole; The central siphon positioning hole of this first side pressure piece can ccontaining one first side plate pin; This second side pressure piece is provided with a central siphon positioning hole, ccontaining one the second side plate pin of the central siphon positioning hole of this second side pressure piece, and this filler member is provided with a central siphon positioning hole; This central siphon positioning hole can wear a spring pin, and this spring pin wears the central siphon positioning hole of this first side pressure piece and the central siphon positioning hole of this second side pressure piece simultaneously.

This first room is provided with a madial wall projection, and an end of this madial wall projection is put this first side pressure piece, and this external tooth axle spare is articulated on this madial wall projection.

This first room is provided with several positioning convex portion, and this positioning convex portion contacts with this internal tooth ring.

The major advantage of the utility model is; By a stabilizer being set between first room of an actuator and a pump body, this first room is provided with several positioning convex portion in addition, and this stabilizer then is provided with an elastic component and top part of pulling; By the pull effect of part of this elastic component and this top; Impel this stabilizer can absorb the vibration that is passed to this internal tooth ring by an external tooth axle spare of this actuator, be aided with the effect of this positioning convex portion simultaneously again, make this internal tooth ring in the time just against running; Can not produce and deflect, all can keep stable and do not make the crescent gear pump vibration.

The utility model minor advantage does; One pump body is provided with one first side pressure piece; Be covered with one second side pressure piece on the pump simultaneously; This first side pressure piece and this second side pressure piece place an external tooth axle spare, can an internal tooth ring and a filler member be clamped on up and down in first room of this pump body simultaneously, make this an internal tooth ring and filler member ability definite be placed in correct working position.

The utility model advantage again does; One actuator includes a cotter pin; This cotter pin is provided with a conflict face; This conflict face can limit the position of a filler member, one first side pressure piece and one second side pressure piece, when making this pump be sent to outlet from sucking working fluid, can keep the pressure in its relative position and change outlet port.

Description of drawings

Fig. 1: the stereo appearance figure that is fit to the crescent gear pump of just contrary running for the utility model.

Fig. 2: the three-dimensional exploded view (containing pump body partial sectional view) that is fit to the crescent gear pump of just contrary running for the utility model.

Fig. 3: the three-dimensional exploded view that is fit to the crescent gear pump of just contrary running for the utility model.

Fig. 4: the sectional view that is fit to the crescent gear pump of just contrary running for the utility model.

Fig. 5: the action schematic representation that is fit to the crescent gear pump of just contrary running for the utility model.

Fig. 6: the action schematic representation that is fit to the crescent gear pump of just contrary running for the utility model.

[primary clustering symbol description]

10 pump bodies, 11 first rooms

111 madial wall projections, 112 positioning convex portion

113 ring surface of contact, 12 locking holes

13 curved surfaces, 14 first ports

15 second ports, 16 protuberances

161 compress face 162 appearance holes

171 part positioning holes of 17 first side pressure pieces

172 central siphon positioning holes, 173 inclined-planes

174 inclined-plane projections, 175 axis body surface of contact

18 filler member, 181 central siphon positioning holes

182 internal tooth surface of contact, 183 axis body surface of contact

184 external tooth surface of contact, 19 spring pin

191 taperings, 192 first side plate pins

193 second side plate pins

21 part positioning holes of 20 pump loam cakes

211 joining holes, 22 involutory holes

231 part positioning holes of 23 second side pressure pieces

232 central siphon positioning holes, 233 axis body surface of contact

24 cotter pins, 241 first fixed ends

242 second fixed ends, 243 conflict faces

30 actuators, 31 external tooth axle spares

311 first shaft parts, 3111 outer toothed portion

3,112 first outer tooth ends 3,113 second outer tooth ends

312 second shaft parts, 3121 keyway seats

313 chamfered section, 32 internal tooth rings

Tooth ends in the 321 internal tooth portions 3,211 first

Tooth ends 322 ports in 3,212 second

40 stabilizers, 41 stabilization

411 receiving parts, 412 connecting parts

414 perforation of 413 hole portions

The part of pulling pushes up in 415 pressure chambers 42

43 elastic components, 44 packing rings

45 oil sealings

The L working fluid.

Embodiment

Please, be the stereo appearance figure and the three-dimensional exploded view (partial sectional view that contains the pump body) that are fit to the just contrary crescent gear pump that turns round of the utility model with reference to Fig. 1 and Fig. 2.The crescent gear pump that the utility model is fit to just contrary running includes a pump body 10, pump loam cake 20, one group of actuator 30 and one group of stabilizer 40; This pump loam cake 20 can be incorporated on this pump body 10; This actuator 30 can be placed in this pump body 10 with this stabilizer 40; The utility model is by setting up this stabilizer 40 that is placed between this actuator 30 and this pump body 10; Make crescent gear pump in when running, can not produce and deflect, can smooth operation and do not produce vibration.

Please with reference to Fig. 2 to Fig. 4, be the three-dimensional exploded view and the sectional view that are fit to the just contrary crescent gear pump that turns round of the utility model, this pump body 10 is Fang Tizhuan; This pump body 10 is provided with one first room 11, and this first room 11 is communicated with an end of this pump body 10, and these first room, 11 middle sections are provided with a madial wall projection 111; The place, top that is positioned at this madial wall projection 111 is provided with several positioning convex portion 112; This positioning convex portion 112 is provided with a ring surface of contact 113, and the wall that is positioned at this first room 11 is provided with a protuberance 16, and this protuberance 16 is provided with one and compresses face 161 and an appearance hole 162; Be positioned at the end face that is communicated with this first room 11 and be provided with several locking holes 12; Four edge surface corners at this pump body 10 are provided with several curved surfaces 13, and this curved surface 13 can prevent that pump base side corner from falling because of collision damages, or prevent that handing-over sideline that the corner falls is too sharp and make injury to personnel; Again; Four edge surface of this pump body 10, wherein an edge surface is provided with one first port 14, then is provided with one second port 15 on another edge surface that is adjacent; This first port 14 is communicated with should hold hole 162, and an end of the other end in this appearance hole 162 and this second port 15 is interconnected with this first room 11 separately.

This pump body 10 is provided with one first side pressure piece 17; This first side pressure piece 17 is placed in this first room 11, and puts on this madial wall projection 111, and this first side pressure piece 17 is provided with an axle spare positioning hole 171 and a central siphon positioning hole 172; This part positioning hole 171 and this central siphon positioning hole 172 are communicated in the both ends of the surface of this first side pressure piece 17 respectively; This central siphon positioning hole 172 can ccontaining one first side plate pin 192, and an end face that is positioned at this first side pressure piece 17 is provided with an inclined-plane 173, is provided with an inclined-plane projection 174 on this inclined-plane 173 in addition; This inclined-plane bumping surface 174 is not a plane with the end that inclined-plane 173 joins; This first side pressure piece 17 is provided with an axis body surface of contact 175 in a side, on this first side pressure piece 17 filler member 18 can be set, and the present embodiment optimum configuration is a moon shape; This filler member 18 is provided with a central siphon positioning hole 181; This central siphon positioning hole 181 is communicated in this filler member 18 both ends of the surface, and this central siphon positioning hole 181 is corresponding each other with the central siphon positioning hole 172 of this first side pressure piece 17, is positioned at these filler member 18 1 arc-shaped side edges faces and is provided with an internal tooth surface of contact 182; Then be provided with an external tooth surface of contact 184 on these filler member 18 another arc-shaped side edges faces; And the non-arc-shaped side edges face that is positioned at this filler member 18 is provided with an axis body surface of contact 183, and one second side plate pin 193 can be put in the other end top that this central siphon positioning hole 181 contacts with this first side pressure piece 17, and this second side plate pin 193 is not to be placed in the central siphon positioning hole 181 of this filler member 18; This second side plate pin 193 can wear a spring pin 19; One end of this spring pin 19 is provided with a tapering 191, and this spring pin 19 wears this filler member 18, this first side plate pin 192 and this first side pressure piece 17 simultaneously, and is incorporated on the madial wall projection 111 of this pump body 10.

This pump loam cake 20 is provided with an axle spare positioning hole 21 and several involutory holes 22, and this involutory hole 22 is corresponding each other with this locking hole 12, and this pump loam cake 20 can be located and with the mode of screw lock with this involutory hole 22; This pump loam cake 20 is locked on this pump body 10; This pump loam cake 20 is provided with a joining hole 211 in addition, these joining hole 211 corresponding cotter pins 24, and this cotter pin 24 is provided with one first fixed end 241 and one second fixed end 242; This second fixed end 242 can be incorporated on the joining hole 211 of this pump loam cake 20; This first fixed end 241 of this cotter pin 24 then is incorporated on the madial wall projection 111 of this pump body 10, and this cotter pin 24 is provided with a conflict face 243 in addition, on the end of this pump loam cake 20 one second side pressure piece 23 can be set; This second side pressure piece 23 is provided with an axle spare positioning hole 231; This part positioning hole 231 is communicated in the both ends of the surface of this second side pressure piece 23, and this part positioning hole 231 is corresponding each other with this part positioning hole 21 of this pump loam cake 20, and this second side pressure piece 23 is provided with a central siphon positioning hole 232 in addition; Central siphon positioning hole 232 is communicated in the both ends of the surface of this second side pressure piece 23; Central siphon positioning hole 232 is corresponding each other with a central siphon positioning hole 181 of this filler member 18, and the central siphon positioning hole 232 of this second side pressure piece 23 can place this second side plate pin 193, is provided with an axis body surface of contact 233 on the edge surface of this second side pressure piece 23 in addition; This conflict face 243 contacts with the axis body surface of contact 183 of this filler member 18; Simultaneously should conflict face 243 be in contact with one another,, reach required locating effect so this cotter pin 24 can limit the actuating range of this first side pressure piece 17 and this filler member 18 with the axis body surface of contact 175 of this first side pressure piece 17.

This actuator 30 includes an external tooth axle spare 31 and an internal tooth ring 32; This external tooth axle spare 31 is provided with one first shaft part 311 and one second shaft part 312, extend this second shaft part 312 on the end face of this first shaft part 311, and the diameter of axle of this first shaft part 311 is greater than the diameter of axle of this second shaft part 312; This first shaft part 311 is provided with an outer toothed portion 3111; This outer toothed portion 3111 is provided with one first outer tooth ends 3112 and one second outer tooth ends 3113, and this outer toothed portion 3111 partly contacts with the external tooth surface of contact 184 of this filler member 18, and this first shaft part 311 can be placed through the axle part positioning hole 171 of this first side pressure piece 17; This first shaft part 311 is via on the axle part positioning hole 171 that is placed through this first side pressure piece 17 simultaneously; This first shaft part 311 can be articulated on this madial wall projection 111, so the first outer tooth ends 3112 of this first shaft part 311 can contact with end part of this first side pressure piece 17, this external tooth axle spare 31 also can pivot by the relative first side pressure piece 17 simultaneously; And this first outer tooth ends 3112 also is in contact with one another with this inclined-plane projection 174 of this first side pressure piece 17; Be positioned at this second shaft part 312 and be provided with a keyway seat 3121 and a chamfered section 313, this keyway seat 3121 can combine a key body to embed, and makes it connect extraneous transmission device; This external tooth axle spare 31 can be pivoted in this first room 11; And on the end face of second shaft part, the 312 contiguous keyway seats 3121 of this external tooth axle spare 31, then be provided with a chamfered section 313, when this chamfered section 313 is connected with extraneous transmission device at this external tooth axle spare 31; Can let connection procedure easy; When pump loam cake 20 is locked on this pump body 10, the second outer tooth ends 3113 on this first shaft part 311 keeps in touch with an end of this second side pressure piece 23, and this external tooth axle spare 31 can form a space with this filler member 18; When external tooth axle spare 31 rotates, the workpiece fluid L that this pump body 10 is sucked will introduce this space and discharge this pump body 10 again.

This internal tooth ring 32 is body in a tubular form; This internal tooth ring 32 is placed in first room 11 of this pump body 10 and is placed on this first side pressure piece 17; These internal tooth ring 32 inwalls are provided with an internal tooth portion 321, tooth ends 3211 and one second interior tooth ends 3212 in this internal tooth portion 321 is provided with one first, and this first interior tooth ends 3211 is in contact with one another with this inclined-plane projection 174; And form a space with this inclined-plane 173; The positioning convex portion 112 of the outside circumferentia of this internal tooth ring 32 and this first room 11 is in contact with one another simultaneously, the outside ring-type face portion of this internal tooth ring 32 is fitted on the ring surface of contact 113 of this positioning convex portion 112, and the curvature of this ring surface of contact 113 is identical with the circumferential curvature in the outside of this internal tooth ring 32; These internal tooth ring 32 outer walls are provided with several ports 322 in addition; This port 322 is interconnected with internal tooth portion 321, and this internal tooth portion 321 is the part engagement with this external tooth axle spare 31 and contacts, and internal tooth portion 321 parts of this outer toothed portion 3111 and this internal tooth ring 32 is meshed contact; Can drive these internal tooth ring 32 relative these first rooms 11 when these external tooth axle spare 31 extraneous transmission devices are connected pivots; This internal tooth ring 32 can ccontaining this filler member 18, and the internal tooth surface of contact 182 of this filler member 18 contacts with internal tooth portion 321 parts, and the external tooth surface of contact 184 of this filler member 18 then contacts with outer toothed portion 3111 parts of external tooth axle spare 31; In these internal tooth ring 32 rotating process; This filler member 18 keeps in touch with this internal tooth portion 321 with this outer toothed portion 3111 all the time, and first of this internal tooth ring 32 interior tooth ends 3211 keeps in touch with this first side pressure piece 17 simultaneously, and these internal tooth ring 32 outer walls and this positioning convex portion 112 keep in touch; When pump loam cake 20 is locked on this pump body 10, this internal tooth ring 32 second in an end of tooth ends 3212 and this second side pressure piece 23 keep in touch.

When this pump loam cake 20 is locked in this pump body 10; Then this actuator 30 is placed in first room 11 of this pump body 10; Therefore this internal tooth ring 32 contacts for the part engagement with this external tooth axle spare 31; This filler member 18 places internal tooth portion 321 inside; The internal tooth surface of contact 182 that makes this filler member 18 contacts with internal tooth portion 321 parts; The external tooth surface of contact 184 of this filler member 18 then contacts with outer toothed portion 3111 parts of external tooth axle spare 31, and set this central siphon positioning hole 181 of this filler member 18 is corresponding with the central siphon positioning hole 232 of this second side pressure piece 23, and the central siphon positioning hole 232 of this second side pressure piece 23 can place this second side plate pin 193; Again; This second side plate pin 193 can be placed by this spring pin 19, and this second side plate pin 193 places on the end of this filler member 18 and corresponding with the central siphon positioning hole 181 of this filler member 18, and this spring pin 19 places the central siphon positioning hole 181 of this filler member 18, central siphon positioning hole 172 and this first side plate pin 192 of this first side pressure piece 17 simultaneously; The tapering 191 of this spring pin 19 in above-mentioned place process after; Can push up and pull on the madial wall projection 111 of this pump body 10, formation is serially connected this second side plate pin 193, this second side pressure piece 23, this filler member 18, this first side pressure piece 17 and the first side plate pin 192, so this first side pressure piece 17 can press from both sides this external tooth axle spare 31 up and down in first room 11 that is formed on this pump body 10 with this internal tooth ring 32 with this second side pressure piece 23; And aforesaid this cotter pin 24 also can limit the actuating range of this first side pressure piece 17, this filler member 18 and this second side pressure piece 23; Make range limited that the first side pressure piece 17, this filler member 18 and this second side pressure piece 23 pivot, and this external tooth axle spare 31 is placed through simultaneously between this first side pressure piece 17 and this second side pressure piece 23, this first side pressure piece 17 and this second side pressure piece 23 also can't be rotated; And between the internal tooth portion 321 of this filler member 18 because of the outer toothed portion 3111 that places external tooth axle spare 31 and this internal tooth ring 32, therefore more limit the actuating range of this filler member 18.

This stabilizer 40 includes a stabilization 41 and an elastic component 43, and this stabilization 41 places between first room 11 of this internal tooth ring 32 and this pump body 10, and this stabilization 41 is provided with a receiving part 411 and several connecting parts 412 in the same side face; Those connecting parts 412 are respectively equipped with a perforation 414, and this perforation 414 runs through this stabilization 41, and this receiving part 411 is provided with a hole portion 413; This hole portion 413 is communicated with the receiving part 411 of this stabilization 41 and another edge surface of this stabilization 41; The receiving part 411 of this stabilization 41 can a ccontaining packing ring 44 and an oil sealing 45, the protuberance 16 that this receiving part 411 simultaneously can ccontaining this pump body 10, and the face that compresses 161 on this protuberance 16 can be oppressed this packing ring 44 and this oil sealing 45; Make this oil sealing 45 produce deformation and clog this protuberance 16 and these receiving part 411 formed slots; Working fluid L can not spilt from slot, and an end of this elastic component 43 places on this receiving part 411, the other end then places in the appearance hole 162 of this protuberance 16; In addition; Pull part 42 and connecting part 412 of the connecting part 412 of this stabilization 41 part 42 of can several tops of clip pulling, this top forms the pressure chamber 415 of a sealing, and this working fluid L can be bored a hole by this and 414 flow into these pressure chambers 415 simultaneously; Part 42 is pulled after this stabilization 41 is put in this top; Can press the wall that touches in first room 11, this stabilization 41 can more firmly be placed between first room 11 of this internal tooth ring 32 and this pump body 10, the bottom surface of this stabilization 41 does not contact with the madial wall projection 111 of this pump body 10 simultaneously; Effect by this elastic component 43; Impel this stabilizer 40 can absorb 31 vibrations that are passed to this internal tooth ring 32 of this external tooth axle spare, flow into the working fluid L of this pressure chamber 415 simultaneously by this pump body 10 because receive this top pull part 42 effect and can't flow out; So can cause this working fluid L to reflux away from the initial perforation 414 that flows into; And the working fluid L of this backflow can touch this internal tooth ring 32, indirectly produces the vibration of stablizing this internal tooth ring 32, makes the crescent gear pump can runs steadily.

Please with reference to Fig. 5, for the action schematic representation that is fit to the just contrary crescent gear pump that turns round of the utility model, when external tooth axle spare 31 clockwise rotates; Working fluid L is inhaled into from second port 15, the port 322 of this internal tooth ring 32 of flowing through, and riddle between the backlash of this external tooth axle spare 31 and this internal tooth ring 32; And be sent to 14 outflows of first port equably, please with reference to Fig. 6, be the action schematic representation of the crescent gear pump that is fit to just contrary running of the utility model; When external tooth axle spare 31 rotated counterclockwise, working fluid L was inhaled into from first port 14, the port 322 of this internal tooth ring 32 of flowing through; And riddle between the backlash of this external tooth axle spare 31 and this internal tooth ring 32; And be sent to 15 outflows of second port equably, among above-mentioned process, working fluid L sentences in inflow and has or not this filler member 18 of flowing through; And make this workpiece fluid L whether produce compressed situation, and then be decided by the height of the pressure in outlet port in the confined space.

This stabilizer 40 is shored an end of this elastic component 43 in the appearance hole 162 of this pump body 10 by this stabilization 41, the other end of this elastic component 43 then stays on the receiving part 411 of this stabilization 41, is positioned at an end of these internal tooth ring 32 these stabilization 41 of outside ring-type face portion applying of this pump body 10; Simultaneously these internal tooth ring 32 outside circumferentias also part fit on the ring surface of contact 113 of this positioning convex portion 112, and pump when running, this external tooth axle spare 31 with transfer of vibration that connected external transmission device produced to this internal tooth ring 32; So; When pump is not when turning round with stability state, promptly running speed is non-remains unchanged always, or the rotation direction flip-flop; The vibration situation that it produced will strengthen; Influence effect and its each parts life-span of pump, therefore, by of the effect of this stabilizer 40 with this positioning convex portion 112; Not only can absorb the vibration of this internal tooth ring 32; And when the just contrary running of this internal tooth ring 32, can not produce and deflect, all can keep stable and do not make the crescent gear pump vibration.

Claims (10)

1. one kind is fit to the just contrary crescent gear pump that turns round, and it is characterized in that it includes:

A pump body, this pump body is provided with one first room, and this first room is provided with at least one positioning convex portion;

A pump loam cake, this pump loam cake is incorporated into this pump body, is covered with an axle spare positioning hole on this pump, and this part positioning hole is communicated in the both ends of the surface of this pump loam cake;

An actuator, this actuator are placed in this pump body, and this actuator comprises an internal tooth ring and an external tooth axle spare; This internal tooth ring is placed in this first room; The outside circumferentia of this internal tooth ring contacts with this positioning convex portion, and this external tooth axle spare is placed in this internal tooth ring, and this external tooth axle spare partly meshes with this internal tooth ring; One end of this external tooth axle spare is arranged in this part positioning hole of pump loam cake, and this external tooth axle spare can connect transmission device;

A stabilizer; This stabilizer is arranged in this first room of this pump body and between this actuator; This stabilizer is provided with one and can absorbs the vibration of this internal tooth ring and make the stabilization that crescent gear pump can runs steadily, and this stabilization places between this first room and this internal tooth ring.

2. the crescent gear pump that is fit to just contrary running according to claim 1 is characterized in that this stabilization is placed with an elastic component, and an end of this elastic component places one of this pump body to hold in the hole, and the other end then places on the receiving part of this stabilization.

3 as claimed in claim 1 for forward and reverse operation of the internal gear pump, characterized in that the chip has several stable coupling portion, the coupling portion so that the combination of a number of stabilizing device can be more firmly disposed in the actuator installed with the pump body occasionally and the first valve chamber between the top piece.

4. the crescent gear pump that is fit to just contrary running according to claim 1; It is characterized in that; This positioning convex portion is provided with a ring surface of contact; The curvature of this ring surface of contact is identical with the outside circumferentia of this internal tooth ring, and the outside ring-type face portion of this internal tooth ring is fitted on this ring surface of contact.

5. the crescent gear pump that is fit to just contrary running according to claim 1; It is characterized in that this pump body is provided with a filler member, this filler member is placed in first room; This external tooth axle spare contacts with this filler member one edge surface, and this internal tooth ring then contacts with another edge surface of this filler member.

6. the crescent gear pump that is fit to just contrary running according to claim 5; It is characterized in that be covered with a joining hole on this pump, this joining hole places an end of a cotter pin; This cotter pin is provided with a conflict face, and this conflict face can limit the position of this filler member.

7. the crescent gear pump that is fit to just contrary running according to claim 5; It is characterized in that; This pump body is provided with one first side pressure piece; Be covered with one second side pressure piece on this pump, this first side pressure piece and sheathed this external tooth axle spare of this second side pressure piece are clamped on this internal tooth ring up and down in this first room of this pump body simultaneously.

8. the crescent gear pump that is fit to just contrary running according to claim 7; It is characterized in that; This first side pressure piece is provided with a central siphon positioning hole, and the central siphon positioning hole of this first side pressure piece can ccontaining one first side plate pin, and this second side pressure piece is provided with a central siphon positioning hole; Ccontaining one the second side plate pin of the central siphon positioning hole of this second side pressure piece; This filler member is provided with a central siphon positioning hole, and this central siphon positioning hole can wear a spring pin, and this spring pin wears the central siphon positioning hole of this first side pressure piece and the central siphon positioning hole of this second side pressure piece simultaneously.

9. based on the described crescent gear pump that is fit to just contrary running of claim 7, it is characterized in that this first room is provided with a madial wall projection, an end of this madial wall projection is put this first side pressure piece, and this external tooth axle spare is articulated on this madial wall projection.

10. the crescent gear pump that is fit to just contrary running according to claim 9 is characterized in that this first room is provided with several positioning convex portion, and this positioning convex portion contacts with this internal tooth ring.

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