CN106050651A

CN106050651A - Internal gear pump and vehicle with an internal gear pump

Info

Publication number: CN106050651A
Application number: CN201610238512.0A
Authority: CN
Inventors: S.特勒布斯特
Original assignee: MAN Truck and Bus SE
Current assignee: MAN Truck and Bus SE
Priority date: 2015-04-18
Filing date: 2016-04-18
Publication date: 2016-10-26
Anticipated expiration: 2036-04-18
Also published as: CN106050651B; RU2016114430A; BR102016008536A2; RU2719005C2; DE102015004984A1; BR102016008536B1; EP3081743A1; EP3081743B1; RU2016114430A3

Abstract

The invention relates to an internal gear pump, in particular trochoid pump, for a vehicle, with a pump housing (3) having a rotor chamber (4) in which a, an internal gear with internal teeth (7a-7g)-tasting tooth ring (6) is received, with a eccentrically to the gear ring (6) is mounted and an external gear with external teeth (12a-12f) having gear (11) is engaged in such a manner can be brought, that in a meshing portion (13a) at least one of the external teeth (12a) in one between two internal teeth (7a; 7g) lying inner tooth space rests, wherein the pump chambers (16) forming volumes between the internal teeth (7a-7g) and said external teeth (12a-12f) in a, a suction chamber (17) associated with the rotor chamber portion, starting from the tooth engagement region (13a) to adjacent to a tooth adjacent region (14a), in which at least one outer tooth (12d) on the head side to an inner teeth (7d), or abuts, to be greater and in one, a pressure chamber (18) associated with the rotor chamber portion, starting from the tooth adjacent region (14a) to the toothed engaging portion (13a) become smaller again. According to the invention, a relief channel (19) is at least provided which forms a flow connection between the tooth engaging portion (13a) and the pressure chamber (18).

Description

Internal gear pump and there is the vehicle of internal gear pump

Technical field

The present invention relates to the internal gear pump of feature forward part according to claim 1, specifically Gerotor pump, and the vehicle with internal gear pump of feature forward part according to claim 15, specifically commerial vehicle.

Background technology

Internal gear pump has many different uses, such as, as the operation fluid pump in vehicle.In this type of uses, it is desirable to, in operation, they should be quiet, so that not having psychoacoustics noise jamming to be sent in driver's cabin or passenger compartment as far as possible.

Internal gear pump or the Gerotor pump of the most known general type include pump case, and it has cylindrical rotor room, and this cylindrical rotor room has the outer rotor of the band internal tooth being rotatably disposed within rotor chamber.Outer toothed internal rotor drives into and turns in outer rotor inward turning, internal tooth and external tooth with cycloid shape with the mutually inter-engaging.Internal rotor has the external tooth of few one of the internal tooth compared to outer rotor.From extending through rotation axis and passing first dead center position from the beginning of the datum plane through the center being positioned to second dead-centre position relative with first dead center position, the external tooth of the internal rotor in mesh regional is fully located in the tooth space of outer rotor.All it is bearing in tooth neighboring region on bizet each other at the second relative dead-centre position, the external tooth of internal rotor and the internal tooth of outer rotor.

Internal rotor first dead center position from datum plane start the most completely revolution, the pump chamber in the ingress port of the end being formed at rotor chamber becomes much larger along direction of rotation.After being to extend through datum plane at the second dead-centre position, pump chamber in the outlet port that the end of rotor chamber is formed equally becomes less the most again, so that when pump chamber becomes less, fluid in the ingress port sucked and receive in pump chamber is compressed in outlet port, and is pumped out by exit aperture.

In this internal gear pump or Gerotor pump of general type, external tooth and the tooth of internal tooth or cycloid shape are selected to so that the tooth surface rolled on each other closely bears against each other, in order to realize high pump efficiency rate with the minimum possible loss in terms of hydrodynamics.But, this has rewarding shortcoming: being transitioned in ingress port from outlet port, the volume of fluid to be pumped is besieged, and it escapes merely by the extruding between the root face of the rotor in the region of first dead center position.The fluctuation being associated in these high fluence and driving torque generates air and the noise emissions of structural bearing, and it shows self by the higher harmonic wave component in corresponding wave spectrum.Due to the increase of driving torque, therefore inevitably generating of extruding stream causes the efficiency of pump to be lost, and additionally, significantly increasing of sound pressure also results in the most joyful notable for human ear of psychoacoustic parameter.Additionally, the pulse that volume flow is from ingress port to outlet port is through generating pressure oscillation at the second dead-centre position every time, this has in addition to frequency and the negative influence of tone frequency spectrum.The scope of this type of standard Gerotor pump use in the shared space on people side can be applied to limit by these acoustics shortcomings emphasized, particularly in vehicle time, wherein noise reduction and the acoustics compatibility present continuous technological challenge.

On the other hand, increase the gap between the bizet between internal rotor and outer rotor, i other words, crown is made smaller than by by the profile of tooth needed for accurate cycloid, in order to realize acoustics improving is known (DE 603 02 110 T2).Which reduce the generation of high intensity extruding stream, it is possible to reduce noise jamming according to the standalone configuration of the cycloid of amendment.But, these possible acoustic advantage are by serious shortcoming counteracting: in operation, the fluid of certain volume then circulates between outlet port and ingress port, and this is associated with the high loss in terms of hydrodynamics and efficiency of pump reduction to a certain extent.

Summary of the invention

It is an object of the invention to develop the internal gear pump of a kind of general type, so that it can be with high efficiency manipulation in terms of hydrodynamics and low noise disturb discharge.A further object of the present invention is to propose a kind of vehicle with this type of internal gear pump, specifically commerial vehicle.

This purpose is realized by the feature of independent patent claim.Favourable development forms the theme of the dependent claims referring back to these independent patent claim.

According to claim 1, it is proposed that a kind of internal gear pump for vehicle, specifically Gerotor pump, it has the pump case of band rotor chamber, and the ring gear of the inner gearing with band internal tooth is contained in this rotor chamber.nullThis ring gear can engage joint with internal gear wheel as follows，This internal gear wheel is equipped with eccentrically about ring gear and has the outer gearing of band external tooth，Make about basic or starting position with about dead-centre position，At mesh regional，At least one in external tooth is positioned in internal tooth space，This internal tooth is spatially located between two internal tooths and specially shape is consistent with profile，Volume between internal tooth and external tooth forms pump chamber，This pump chamber becomes much larger during distributing to ingress port and extending to the rotor chamber region of tooth neighboring region from mesh regional，This tooth neighboring region is preferably positioned to relative with mesh regional，And at least one of which external tooth is bearing on the bizet of internal tooth at or adjacent to ground，And during distributing to outlet port and extending to the rotor chamber region of mesh regional from tooth neighboring region, again become less.I other words, in other words, the volume formed when pump is actuated between internal tooth and the external tooth of pump chamber becomes much larger to being preferably positioned to tooth neighboring region that is relative with mesh regional and that distribute to the second dead-centre position from the mesh regional distributing to distribute to the first dead center position the rotor chamber region of the ingress port of pump, and the then tooth neighboring region in traveling through the rotor chamber region distributing to outlet port and again become less after extending to mesh regional.According to the present invention, there is presently provided at least one release catheter, its flowing formed between mesh regional and outlet port is connected, so that fluid or extruding stream can flow to from mesh regional or flow out outlet port.

This means in this region, the volume closing and being additionally formed crucial extruding stream is discharged in outlet port wittingly advantageous by least one release catheter, or the extrusion fluid in this region always can escape into outlet port.This discharge in outlet port is used for making extruding minimization of loss, so that the generation of noise interference minimizes the most accordingly.But, compared to having the measure of the prior art of gap enlargement, the extruding stream being discharged in outlet port continues to can be used as useful volume, so that by amount of compression is discharged in outlet port to occur without loss in terms of hydrodynamics wittingly.

In mesh regional, at least one external tooth herein is positioned in internal tooth space the most as follows so that this tooth is completely or substantially received with its entirety, and therefore the pump chamber with zero volume or essence zero volume is formed at there.I other words, at least one external tooth in mesh regional is preferably completely positioned in internal tooth space, or consistent with profile substantially without any gap and/or shape.

In their design, in the rotor chamber walls of pump case, ingress port and outlet port advantageously from mesh regional and/or tooth neighboring region a distance and with formed apart from each other and/or open, this rotor chamber walls end and ring gear and gear take turns (toothed region that the concrete gear with ring gear and formed by toothed belt gear device is taken turns) neighbouring, be specifically immediately adjacent to.In terms of production engineering, especially with respect to this type of embodiment advantageously, if in the wall region of the rotor chamber walls that at least one release catheter is formed at the pump case with mesh regional neighbouring (being specifically immediately adjacent to), and leading to the outlet port being identically formed in rotor chamber walls in the distance from it or opening therefrom.Herein, be particularly easy in terms of production engineering is to make at least one release catheter be preferably formed into be opened to rotor chamber and be therefore opened to the groove of ring gear/gear wheel.

According to giving extruding stream from the favourable development of the reality of the best discharge of mesh regional, its mesh regional side catheter end that at least one release catheter is designed so that in mesh regional as follows is only assigned to the external tooth of internal gear wheel.

Practical development is also especially preferred, and wherein, the catheter section of at least one release catheter is sized to be discharged to outlet port from it so that at least 60% of the extruding stream in mesh regional.Which ensure that the extruding flow of maximum possible flow to outlet port away from mesh regional.

The particular configuration of at least one release catheter gives and can be intentionally used for when the optimization range of front pump design.Psychoacoustics noise jamming thus can minimize, especially with respect to the loudness of Bark group of frequencies 5-15 with relative to roughness.Herein, the catheter section of at least one release catheter and/or catheter length may be designed so that the specific loudness of the pump in operation reduces as follows in Bark group of frequencies 5-15, make it not over 3sone/Bark, and/or to cause the maximal roughness of the 1.2asper/Bark in Bark group of frequencies scope 5-15.

In another especially preferred development of the internal gear pump according to the present invention, it is possible to provide at least one subsidiary conduit, its flowing formed between tooth neighboring region and outlet port is connected.This advantageously makes the pressure oscillation pumping fluid of the transition position from ingress port to outlet port minimize, so that this measure is additionally useful for optimizing psychoacoustic parameter, and this is not resulted in loss in efficiency.

It is also similar to that release catheter herein, it is then possible that, at least one subsidiary conduit is formed in the wall region of neighbouring with tooth neighboring region (being specifically immediately adjacent to) and the rotor chamber walls of leading to the outlet port being identically formed in rotor chamber walls and/or opening in the distance from it therefrom, and at least one subsidiary conduit is also preferably formed to be opened to the groove of rotor chamber.Which results in the favourable functional embodiment of easily generation.

The particular configuration of at least one subsidiary conduit gives and can again be intentionally used for when the optimization range of front pump design.Therefore, the specific loudness of the pump that the catheter section of at least one subsidiary conduit and/or catheter length are preferably designed such that in operation reduces as follows in Bark group of frequencies 3-10, make it be less than 4sone/Bark, and/or to cause the maximal roughness of the 2asper/Bark in Bark group of frequencies scope 3-10.

Another preferred pump structure according to simple designs, ingress port and outlet port are positioned on the opposite side of the datum plane limited by mesh regional and tooth neighboring region (mesh regional and tooth neighboring region are advantageously located at toward each other), and in all cases, open in distributing to the end wall of pump case of rotor chamber in the distance from these regions.But, alternately or it addition, one or more rotation axis that this datum plane also can be taken turns by ring gear or internal gear limit, at least one of which is rotatable design.

By release catheter and/or the applicable structure of subsidiary conduit, it is therefore possible to, limit specific loudness and roughness, so that in addition to the reduction of the sound pressure level being substantially reduced and sending of pressure pulse, result in the obvious optimization of psychoacoustic parameter, this does not cause any loss in efficiency.

According to especially preferred development, internal gear pump is Gerotor pump, wherein tooth with cycloid shape with the mutually inter-engaging.

Additionally, wherein internal gear wheel has especially preferred compared to developing into of the external tooth of few one of the internal tooth of ring gear.Particularly advantageous result obtains under the background about Gerotor pump, and its ring gear has seven internal tooths, and internal gear wheel has six external tooths.

Such as, ring gear is the outer rotor being rotatably disposed within rotor chamber.But, alternately, it is also possible to be that only internal gear wheel is embodied as the internal rotor that is rotatably driven.Wherein the ring gear as outer rotor and the internal gear as internal rotor take turns both for rotating the development driven is especially preferred.

The advantage occurred along with the vehicle of prescription is identical with advantage set forth above, and repeats the most clearly.

Accompanying drawing explanation

The present invention is only via example explaination referring to the drawings, in the figure

Fig. 1 shows the top view of the internal gear pump being embodied as Gerotor pump in axial direction, wherein eliminates case lid, and

Fig. 2 shows the cross section through the Gerotor pump according to Fig. 1 along datum plane A-A.

List of parts

1 Gerotor pump

2 datum planes

3 housings

4 rotor chambers

4a rotor chamber walls

5 chamber caps

6 outer rotors

7a-7g internal tooth

8 outer rotor axis

9 power transmission shafts

10 transmission axis

11 internal rotors

12a-12f external tooth

13 first dead center positions

13a mesh regional

14 second dead-centre positions

14a tooth neighboring region

15 rotation arrows

16 pump chambers

17 ingress ports

18 outlet port

19 release catheters

20 subsidiary conduits.

Detailed description of the invention

Fig. 1 presents the top view of the internal gear pump being embodied as Gerotor pump 1 (not having case lid), and the sectional view that Fig. 2 is the datum plane 2 (line A-A) along Fig. 1.

Gerotor pump 1 includes the pump case 3 with pref. cylindrical rotor chamber 4, and pref. cylindrical rotor chamber 4 is closed (see Fig. 2) by chamber cap 5 in operational state.In FIG, chamber cap 5 is removed and is provided the view of the inside of room.

The outer rotor 6 (it is formed as ring gear, and it has inside internal tooth 7a to the 7g of multiple directions (herein showing only seven via example)) being preferably similar to cylindrical outer shape is pivotally supported in rotor chamber 4.The cylinder axis of rotor chamber 4 and the rotation axis of outer rotor 6 are identified by reference 8.

The internal rotor 11 rotated around transmission axis 10 is driven to arrange prejudicially and be supported in outer rotor 6 by means of power transmission shaft 9.Herein, internal rotor 11 is preferably provided with the external tooth of few, and is therefore provided with six external tooth 12a to 12f in example shown here.Internal tooth 7a to 7g and external tooth 12a to 12f with cycloid shape with the mutually inter-engaging.

Datum plane 2 through first (on) center of dead-centre position 13, through two axis 8 and 10 about eccentric excursions each other, and through second and the lower dead point position 14 of substantially relative localization.At first dead center position 13, the external tooth 12a in mesh regional 13a is fully or substantially positioned in internal tooth space (this is between internal tooth 7a and 7g) with its entirety, i other words, consistent with profile substantially without any gap and/or shape.On the other hand, at the second dead-centre position 14, external tooth 12d is located against the bizet of internal tooth 7d or adjacent in tooth neighboring region 14a.

Rotating in (rotation arrows 15) counterclockwise, each being used as between internal tooth and external tooth in the volume of pump chamber 16 starts to increase from datum plane 2 and first dead center position 13, until reaching the second dead-centre position 14 in left rotor chamber region.Fluid to be pumped is therefore by the pump chamber 16 sucking-off ingress port 17 expanded.Ingress port 17 is the most only drawn with dotted line, and end face with internal rotor 11 and the toothed region of outer rotor 6 is adjacently formed (for clarity, eliminating the fluid line connector as entrance) in rotor chamber walls 4a of rotor chamber 4.

When internal rotor 11 continues to rotate, reduce to the right side of datum plane 2 and the pump chamber 16 from the rotor chamber region that the second dead-centre position 14 starts in the mobile period size towards first dead center position 13, thus will remain in the fluid in ingress port 17 to release pump chamber 16 and enter outlet port 18, and discharged from the latter by pump line (in order to clearly reason is not shown).Outlet port 18 is the most also schematically shown by dotted line, and (being similar to ingress port 17) end face with outer rotor 6 and internal rotor 11 in rotor chamber walls 4a of rotor chamber 4 is adjacently formed.As shown in fig. 1, herein, ingress port 17 and outlet port 18 may be formed in same rotor chamber walls 4a or on, or alternately, also in different rotor chamber walls 4a；Such as, as shown in Figure 2, in relative rotor chamber walls 4a.

As being positioned at from mesh regional 13a and the restriction distance of tooth neighboring region 14a from both the further finding of Fig. 1, ingress port 17 and outlet port 18, so that rotor chamber walls 4a is substantially directly adjacent to there.As a result, already mentioned extruding stream may be formed in mesh regional 13a, and pressure oscillation can generate in tooth neighboring region 14a.

In order to avoid everything and thus reduce noise jamming, in the exemplary embodiment of the Gerotor pump 1 presented, groove-like release catheter 19 is formed in the wall region of rotor chamber walls 4a being substantially directly adjacent to mesh regional 13a, and groove-like subsidiary conduit 20 is formed in the wall region of rotor chamber walls 4a being substantially directly adjacent to tooth neighboring region 14a, i other words, in other words, in the region of rotor chamber walls 4a being formed at the rotor chamber 4 that the end face with outer rotor 6 and internal rotor 11 is substantially directly adjacent to or on, and in rotor chamber walls 4a, lead to the outlet port 18 being identically formed in rotor chamber walls 4a in the distance from it or opening therefrom.

Herein, both release catheter 19 and subsidiary conduit 20 are formed as being opened to the groove of rotor chamber 4, but in the case of needs, are also formed as in rotor chamber walls 4a the conduit extended.

Herein, in the illustrated exemplary embodiment, release catheter 19 extends from datum plane 2 as flow-catheter, and thus center from mesh regional 13a extends to outlet port 18.As a result, extruding stream is avoided in mesh regional 13a, and is discharged in outlet port 18, the most advantageously reduces psychoacoustics noise jamming.

Subsidiary conduit 20 likewise extends into outlet port 18 from the center of tooth neighboring region 14a as flow-catheter.From ingress port 17 to the transition of outlet port 18 on this point at pulse type pressure oscillation thus reduce, so that realizing the further reduction of noise jamming.

Claims

1. the internal gear pump for vehicle, specifically Gerotor pump, it has the pump case (3) of band rotor chamber (4), the ring gear (6) of the inner gearing with band internal tooth (7a-7g) is contained in described rotor chamber (4), described ring gear (6) can engage joint with gear wheel (11) as follows, described gear wheel (11) is equipped with eccentrically about described ring gear (6) and has the outer gearing of band external tooth (12a-12f), make at mesh regional (13a) place, at least one in described external tooth (12a) is in and is positioned at two internal tooth (7a;In internal tooth space between 7g), the volume forming pump chamber (16) between described internal tooth (7a-7g) and described external tooth (12a-12f) is being distributed to ingress port (17) and is being extended to become much larger the rotor chamber region of tooth neighboring region (14a) from described mesh regional (13a), at least one of which external tooth (12d) is bearing on the bizet of internal tooth (7d) at or adjacent to ground, and distributing to outlet port (18) and extending to the rotor chamber region of described mesh regional (13a) becomes less again from described tooth neighboring region (14a),

It is characterized in that,

Providing at least one release catheter (19), its flowing formed between described mesh regional (13a) and described outlet port (18) is connected.

Internal gear pump the most according to claim 1, it is characterized in that, described ingress port (17) and described outlet port (18) from described mesh regional (13a) and/or a distance of described tooth neighboring region (14a) and in the rotor chamber walls (4a) of described rotor chamber (4) with formed apart from each other and/or open, it is neighbouring that described rotor chamber walls (4a) takes turns (11) in end with described ring gear (6) and described gear, is specifically immediately adjacent to.

Internal gear pump the most according to claim 2, it is characterized in that, described at least one release catheter (19) is formed at neighbouring with described mesh regional (13a), in the wall region of the described rotor chamber walls (4a) being specifically directly adjacent to, and lead to the described outlet port (18) being identically formed in the distance from it and/or opening in described rotor chamber walls (4a) therefrom.

4. according to the internal gear pump described in claim 2 or claim 3, it is characterised in that described at least one release catheter (19) is formed as being opened to the groove of described rotor chamber (4).

5. according to the internal gear pump described in claim 3 or claim 4, it is characterized in that, described at least one release catheter (19) is formed as follows so that its mesh regional side catheter end in described mesh regional (13a) is only assigned to the described external tooth (12a) of described internal gear wheel (11).

6. according to a described internal gear pump in aforementioned claim, it is characterized in that, the catheter section of described at least one release catheter (19) is sized to be discharged to described outlet port (18) from described mesh regional (13a) so that at least the 60% of extruding stream.

7. according to a described internal gear pump in aforementioned claim, it is characterized in that, the catheter section of described at least one release catheter (19) and/or catheter length are designed so that the specific loudness of described pump reduces the most as follows in Bark group of frequencies 5-15, make it be less than 3sone/Bark, and/or to cause the maximal roughness of the 1.2asper/bark in Bark group of frequencies scope 5-15.

8. according to a described internal gear pump in aforementioned claim, it is characterized in that, providing at least one subsidiary conduit (20), its flowing formed between described tooth neighboring region (14a) and described outlet port (18) is connected.

Internal gear pump the most according to claim 8, it is characterized in that, described at least one subsidiary conduit (20) is formed at neighbouring with described tooth neighboring region (14a), in the wall region of the described rotor chamber walls (4a) being specifically immediately adjacent to, and lead to the described outlet port (18) being identically formed in the distance from it and/or opening in described rotor chamber walls (4a) therefrom.

Internal gear pump the most according to claim 9, it is characterised in that described at least one subsidiary conduit (20) is formed as being opened to the groove of described rotor chamber (4).

11. according to Claim 8 to a described internal gear pump in claim 10, it is characterized in that, the catheter section of described at least one subsidiary conduit (20) and/or catheter length are designed so that the specific loudness of described pump reduces the most as follows in Bark group of frequencies 3-10, make it be less than 4sone/Bark, and/or to cause the maximal roughness of the 2asper/bark in Bark group of frequencies scope 3-10.

12. according to a described internal gear pump in aforementioned claim, it is characterized in that, described ingress port (17) and described outlet port (18) are positioned on the opposite side of the datum plane (2) limited by described mesh regional (13a) and described tooth neighboring region (14a), and open in distributing to the rotor chamber walls (4a) of described pump case (3) of described rotor chamber (4) in the distance from these regions (13a, 14a) in several cases.

13. according to a described internal gear pump in aforementioned claim, it is characterized in that, described ring gear (6) is for being rotatably disposed within the outer rotor in described rotor chamber (4), and/or described internal gear wheel (11) is to drive into the internal rotor rotated in described outer rotor.

14. according to a described internal gear pump in aforementioned claim, it is characterized in that, described gear pump (1) is Gerotor pump, wherein said tooth is with cycloid shape with the mutually inter-engaging, and/or described gear wheel (11) has the external tooth (12) of few compared to the described internal tooth (7) of described ring gear (6).

15. have the vehicle according to a described gear pump (1) in aforementioned claim, specifically commerial vehicle.