CN114263599A - Helical gear pump with axial play compensation and method for reducing wear thereof - Google Patents
Helical gear pump with axial play compensation and method for reducing wear thereof Download PDFInfo
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- CN114263599A CN114263599A CN202111448785.5A CN202111448785A CN114263599A CN 114263599 A CN114263599 A CN 114263599A CN 202111448785 A CN202111448785 A CN 202111448785A CN 114263599 A CN114263599 A CN 114263599A
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- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000005299 abrasion Methods 0.000 claims abstract description 37
- 238000007906 compression Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000012417 linear regression Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention discloses a helical gear pump with axial float compensation and a method for reducing abrasion, wherein the gear pump comprises a pump cover, an intermediate body and a base, wherein a driving shaft and a driven shaft penetrate through the pump cover, the intermediate body and the base; pump cover and base all are connected through bolt and midbody, be provided with engaged with driving gear and driven gear in the midbody, driving shaft and driven shaft all rotate through first bearing and connect in the pump cover, driving shaft and driven shaft all rotate through the second bearing and connect in the base, between driving gear and the pump cover, and all be provided with first thrust ball bearing between driven gear and the pump cover, between driving gear and the base, and all be provided with second thrust ball bearing between driven gear and the base, be provided with compression spring between first bearing and the first thrust ball bearing. The gear pump is reasonable in design, convenient to implement, capable of being effectively applied to the gear pump, capable of reducing end face leakage and prolonging service life, remarkable in effect and convenient to popularize and use.
Description
Technical Field
The invention belongs to the technical field of gear pumps, and particularly relates to a helical gear pump with axial float compensation and a method for reducing abrasion of the helical gear pump.
Background
The gear pump is one of flow pumps, and is designed into a helical gear pump in order to reduce the noise problem of a straight gear pump, but the helical gear pump always has the problem that a driving gear and a driven gear move up and down in the working process, so that the flow end face leaks, and on the other hand, in the conventional gear pump, in order to reduce the abrasion between the gear end face and a pump cover or a base, the abrasion of a lining plate is generally used for reducing the abrasion of the gear end face, the pump cover and the base, so that the lining plate needs to be replaced regularly. There is also wear on the gear pump shaft, and rolling bearings are currently used to reduce wear, which, while reducing the amount of wear, is not the optimal way.
Disclosure of Invention
The invention aims to solve the technical problem that the helical gear pump with the axial float compensation and the method for reducing the abrasion thereof are provided aiming at the defects in the prior art, and the helical gear pump with the axial float compensation has the advantages of simple structure, reasonable design, convenient realization, effective application in the gear pump, reduction of end face leakage, prolonged service life, obvious effect and convenient popularization and use.
In order to solve the technical problems, the invention adopts the technical scheme that: a helical gear pump with axial float compensation comprises a pump cover, an intermediate body and a base, wherein a driving shaft and a driven shaft penetrate through the pump cover, the intermediate body and the base; the pump cover and the base are connected with the intermediate through bolts, an oil inlet and an oil outlet are formed in the intermediate, a driving gear and a driven gear which are meshed with each other are arranged in the intermediate, the driving gear is connected onto the driving shaft, the driven gear is connected onto the driven shaft, the driving shaft and the driven shaft are connected into the pump cover through first needle roller bearings in a rotating mode, the driving shaft and the driven shaft are connected into the base through second needle roller bearings in a rotating mode, first thrust ball bearings are arranged between the driving gear and the pump cover and between the driven gear and the pump cover, second thrust ball bearings are arranged between the driving gear and the base and between the driven gear and the base, and compression springs are arranged between the first needle roller bearings and the first thrust ball bearings.
The invention also discloses a method for reducing the abrasion by adopting the helical gear pump, which comprises a method for reducing the abrasion of the end face of the gear, a method for reducing the abrasion of the gear shaft and an axial float compensation method; the method for reducing the wear of the end face of the gear is realized through a first thrust ball bearing and a second thrust ball bearing, the method for reducing the wear of the gear shaft is realized through a first needle bearing and a second needle bearing, and the axial float compensation method is realized through a compression spring.
The method for reducing the wear of the helical gear pump with the axial float compensation comprises the following specific processes of: in the rotation process of the driving gear and the driven gear, the outer diameter of a first thrust ball bearing between the driving gear and the pump cover is smaller than the small diameter of the driving gear, so that the driving gear and the first thrust ball bearing synchronously rotate, and the abrasion of the end surface of the driving gear and the end surface of the pump cover is reduced; the outer diameter of a first thrust ball bearing between the driven gear and the pump cover is smaller than the small diameter of the driven gear, so that the driven gear and the first thrust ball bearing rotate synchronously, and the abrasion of the end face of the driven gear and the end face of the pump cover is reduced; the outer diameter of a second thrust ball bearing between the driving gear and the base is smaller than the small diameter of the driving gear, so that the driving gear and the second thrust ball bearing synchronously rotate, and the abrasion of the end surface of the driving gear and the end surface of the base is reduced; the outer diameter of a second thrust ball bearing between the driven gear and the base is smaller than the small diameter of the driven gear, so that the driven gear and the second thrust ball bearing rotate synchronously, and the abrasion of the end face of the driven gear and the end face of the base is reduced.
The method for reducing the abrasion of the helical gear pump with the axial play compensation comprises the following specific processes: in the rotating process of the driving shaft and the driven shaft, the first needle roller bearing between the driving shaft and the pump cover and the second needle roller bearing between the driving shaft and the base can reduce the abrasion loss of the driving shaft; the first needle bearing between driven shaft and the pump cover to and the second needle bearing between driven shaft and the base can reduce the wearing and tearing volume of driven shaft.
The method for reducing the abrasion of the helical gear pump with the axial play compensation comprises a spring stiffness design method of a compression spring, and the spring stiffness design method comprises the following steps:
step 101, determining a rotating speed range [ n ] of the helical gear pump during workinga,nb]And axial float travel range [ X ]a,Xb]；
102, equally dividing and dispersing a full working condition plane formed by the rotating speed and the axial movement stroke to obtain corresponding discrete working condition points [ n ] in the full working condition planem,Xn]Wherein n ismExpressed as a range of rotational speeds na,nb]Any rotational speed, X, corresponding to the discrete halvingnIndicating axial float travel range [ X ]a,Xb]Equally dividing any corresponding axial movement stroke in a discrete manner;
step 201, adjusting the rotating speed in sequence to obtain the axial force of different discrete working condition points;
202, working strokes under different discrete working conditions are obtained according to different rotation speed values;
respectively calculating the axial forces of the discrete working points with the same working speed and different working strokes, and averaging
Obtaining a series of linear regression sample points of the rotating speed and the average axial force
Wherein the content of the first and second substances,
in the formula, F (n)m,Xn) Representing discrete operating points [ n ]m,Xn]The corresponding axial force, f, represents the number of equally divided working strokes;
using least square method or partial least square method to sample points
Performing linear regression to obtain linear regression equation of rotation speed and average axial force
Wherein the content of the first and second substances,
is nmCorresponding predicted values of regression average axial force, wherein k and b are regression coefficients;
in the formula (I), the compound is shown in the specification,
is a rotational speed nbThe corresponding regression average axial force predicted value,
is a rotational speed naCorresponding regression mean axial force prediction values.
Compared with the prior art, the invention has the following advantages:
1. the helical gear pump is simple in structure, reasonable in design and convenient to achieve.
2. According to the invention, the compression spring is adopted to perform clearance compensation on the vertical movement of the gear, so that the vertical movement problem of the driving gear and the driven gear is solved, and the end face leakage is reduced.
3. The invention adopts the thrust ball bearing to reduce the wear of the end surface of the gear and prolong the service time of the gear.
4. The invention adopts the needle bearing to replace a rolling bearing, thereby reducing the abrasion loss of the gear shaft.
5. The spring stiffness design method disclosed by the invention constructs the function relation between the rotating speed and the average axial force by a linear regression method, so that the spring stiffness parameters are quickly and accurately obtained.
6. The invention can be effectively applied to the gear pump, reduces end face leakage, prolongs the service life, has obvious effect and is convenient to popularize and use.
In conclusion, the gear pump has the advantages of simple structure, reasonable design, convenience in implementation, capability of being effectively applied to the gear pump, capability of reducing end face leakage and prolonging service life, remarkable effect and convenience in popularization and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a front cross-sectional view of a helical gear pump of the present invention;
FIG. 2 is a side sectional view of the helical gear pump of the present invention;
FIG. 3 is an assembled view of the helical gear pump of the present invention;
fig. 4 is an exploded view of the helical gear pump of the present invention.
Description of reference numerals:
1-pump cover; 2-an intermediate; 3, a base;
4-driving shaft; 5, a driven shaft; 6, bolts;
7-an oil inlet; 8-oil outlet; 9-a driving gear;
10-a driven gear; 11-a first needle bearing; 12-a second needle bearing;
13-a first thrust ball bearing; 14-a second thrust ball bearing; 15-compression spring.
Detailed Description
As shown in fig. 1 to 4, the helical gear pump with axial float compensation of the present invention comprises a pump cover 1, an intermediate body 2 and a base 3, wherein a driving shaft 4 and a driven shaft 5 penetrate through the pump cover 1, the intermediate body 2 and the base 3; the pump cover 1 and the base 3 are both connected with the intermediate body 2 through bolts 6, the intermediate body 2 is provided with an oil inlet 7 and an oil outlet 8, a driving gear 9 and a driven gear 10 which are engaged with each other are arranged in the intermediate body 2, the driving gear 9 is connected on the driving shaft 4, the driven gear 10 is connected on the driven shaft 5, the driving shaft 4 and the driven shaft 5 are both rotationally connected in the pump cover 1 through a first needle bearing 11, the driving shaft 4 and the driven shaft 5 are rotatably connected in the base 3 through a second needle bearing 12, between the driving gear 9 and the pump cover 1, and a first thrust ball bearing 13 is arranged between the driven gear 10 and the pump cover 1, a second thrust ball bearing 13 is arranged between the driving gear 9 and the base 3, and a second thrust ball bearing 14 is arranged between the driven gear 10 and the base 3, and a compression spring 15 is arranged between the first needle bearing 11 and the first thrust ball bearing 13.
In specific implementation, when the driving gear 9 and the driven gear 10 move up and down, the axial movement is compensated by the compression spring 15, so that the driving gear 9 and the driven gear 10 are synchronized in the axial direction.
The invention relates to a method for reducing abrasion of a helical gear pump, which comprises a method for reducing the abrasion of the end surface of a gear, a method for reducing the abrasion of a gear shaft and an axial float compensation method; the method for reducing the wear of the end faces of the gears is realized by the first thrust ball bearing 13 and the second thrust ball bearing 14, the method for reducing the wear of the gear shafts is realized by the first needle bearing 11 and the second needle bearing 12, and the method for compensating the axial movement is realized by the compression spring 15.
In this embodiment, the specific process of the method for reducing the wear of the end face of the gear, which is implemented by the first thrust ball bearing 13 and the second thrust ball bearing 14, includes: in the rotation process of the driving gear 9 and the driven gear 10, the outer diameter of a first thrust ball bearing 13 between the driving gear 9 and the pump cover 1 is smaller than the small diameter of the driving gear 9, so that the driving gear 9 and the first thrust ball bearing 13 synchronously rotate, and the abrasion of the end surface of the driving gear 9 and the end surface of the pump cover 1 is reduced; the outer diameter of a first thrust ball bearing 13 between the driven gear 10 and the pump cover 1 is smaller than the small diameter of the driven gear 10, so that the driven gear 10 and the first thrust ball bearing 13 synchronously rotate, and the abrasion of the end surface of the driven gear 10 and the end surface of the pump cover 1 is reduced; the outer diameter of a second thrust ball bearing 14 between the driving gear 9 and the base 3 is smaller than the small diameter of the driving gear 9, so that the driving gear 9 and the second thrust ball bearing 14 synchronously rotate, and the abrasion of the end surface of the driving gear 9 and the end surface of the base 3 is reduced; the outer diameter of the second thrust ball bearing 14 between the driven gear 10 and the base 3 is smaller than the small diameter of the driven gear 10, so that the driven gear 10 and the second thrust ball bearing 14 rotate synchronously, and the abrasion of the end face of the driven gear 10 and the end face of the base 3 is reduced.
During specific implementation, when the driving gear 9 and the driven gear 10 rotate, the driving gear 9 and the driven gear 10 can move up and down due to fluid in the pump, and further abrasion loss of the end face of the driving gear 9 and the end face of the pump cover 1, the end face of the driving gear 9 and the end face of the base 3, and abrasion loss of the end face of the driven gear 10 and the end faces of the pump cover 1 and the end face of the driven gear 10 and the end face of the base 3 can be increased.
In this embodiment, the specific process of the method for reducing wear of the gear shaft includes: in the rotating process of the driving shaft 4 and the driven shaft 5, the first needle roller bearing 11 between the driving shaft 4 and the pump cover 1 and the second needle roller bearing 12 between the driving shaft 4 and the base 3 can reduce the abrasion loss of the driving shaft 4; the first needle bearing 11 between the driven shaft 5 and the pump cover 1, and the second needle bearing 12 between the driven shaft 5 and the base 3 can reduce the amount of wear of the driven shaft 5.
In this embodiment, the axial play compensation method includes a spring stiffness design method for the compression spring 15, and the spring stiffness design method includes the following steps:
step 101, determining a rotating speed range [ n ] of the helical gear pump during workinga,nb]And axial float travel range [ X ]a,Xb]；
102, equally dividing and dispersing a full working condition plane formed by the rotating speed and the axial movement stroke to obtain corresponding discrete working condition points [ n ] in the full working condition planem,Xn]Wherein n ismExpressed as a range of rotational speeds na,nb]Any rotational speed, X, corresponding to the discrete halvingnIndicating axial float travel range [ X ]a,Xb]Equally dividing any corresponding axial movement stroke in a discrete manner;
step 201, adjusting the rotating speed in sequence to obtain the axial force of different discrete working condition points;
202, working strokes under different discrete working conditions are obtained according to different rotation speed values;
respectively calculating the axial forces of the discrete working points with the same working speed and different working strokes, and averaging
Obtaining a series of linear regression sample points of the rotating speed and the average axial force
Wherein the content of the first and second substances,
in the formula, F (n)m,Xn) Representing discrete operating points [ n ]m,Xn]The corresponding axial force, f, represents the number of equally divided working strokes;
using least square method or partial least square method to sample points
Performing linear regression to obtain linear regression equation of rotation speed and average axial force
Wherein the content of the first and second substances,
is nmCorresponding predicted values of regression average axial force, wherein k and b are regression coefficients;
in the formula (I), the compound is shown in the specification,
is a rotational speed nbThe corresponding regression average axial force predicted value,
is a rotational speed naCorresponding regression mean axial force prediction values.
In specific implementation, the compression spring 15 compensates the axial displacement generated by the helical gear in the rotation process, and if the axial thrust of the compression spring 15 is too large, the end face of the gear and the end face of the pump cover 1 are pressed to be dead and cannot rotate; if the end face clearance is too small, the risk of an increase in the end face clearance is caused, and internal leakage is likely to occur, so that the compression spring 15 needs to be designed to have a spring rate.
The working process of the invention is as follows: the driving gear 9 drives the driven gear 10 to rotate in the cavity of the intermediate body 2, after low-pressure oil enters from the oil inlet 7, the high-pressure oil is output to the oil outlet 8 through the matched motion of the driving gear 9 and the driven gear 10, the abrasion of the end surfaces of the driving gear 9 and the driven gear 10 is reduced through the first thrust ball bearing 13 and the second thrust ball bearing 14, and the rotational abrasion of the driving shaft 4 and the driven shaft 5 is reduced through the first needle bearing 11 and the second needle bearing 12; when the driving gear 9 and the driven gear 10 move up and down, the axial movement compensation is carried out through the compression spring 15, the synchronization of the driving gear 9 and the driven gear 10 in the axial direction is realized, and further the end face leakage is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. A helical gear pump with axial float compensation comprises a pump cover (1), an intermediate body (2) and a base (3), wherein a driving shaft (4) and a driven shaft (5) penetrate through the pump cover (1), the intermediate body (2) and the base (3); pump cover (1) and base (3) all are connected with midbody (2) through bolt (6), be provided with oil inlet (7) and oil-out (8) on midbody (2), be provided with engaged with driving gear (9) and driven gear (10) in midbody (2), driving gear (9) are connected on driving shaft (4), driven gear (10) are connected on driven shaft (5), its characterized in that: the pump cover is characterized in that the driving shaft (4) and the driven shaft (5) are rotatably connected into the pump cover (1) through a first needle bearing (11), the driving shaft (4) and the driven shaft (5) are rotatably connected into the base (3) through a second needle bearing (12), a first thrust ball bearing (13) is arranged between the driving gear (9) and the pump cover (1) and between the driven gear (10) and the pump cover (1), a second thrust ball bearing (14) is arranged between the driving gear (9) and the base (3) and between the driven gear (10) and the base (3), and a compression spring (15) is arranged between the first needle bearing (11) and the first thrust ball bearing (13).
2. A method of reducing wear using a helical gear pump with axial play compensation as claimed in claim 1, characterized in that: the method comprises a method for reducing the abrasion of the end face of the gear, a method for reducing the abrasion of a gear shaft and an axial float compensation method; the method for reducing the wear of the end face of the gear is realized by a first thrust ball bearing (13) and a second thrust ball bearing (14), the method for reducing the wear of the gear shaft is realized by a first needle bearing (11) and a second needle bearing (12), and the axial float compensation method is realized by a compression spring (15).
3. Method for reducing the wear of a helical gear pump with axial play compensation according to claim 2, characterized in that the specific process of reducing the wear of the gear face by means of the first thrust ball bearing (13) and the second thrust ball bearing (14) comprises: in the rotation process of the driving gear (9) and the driven gear (10), the outer diameter of a first thrust ball bearing (13) between the driving gear (9) and the pump cover (1) is smaller than the small diameter of the driving gear (9), so that the driving gear (9) and the first thrust ball bearing (13) rotate synchronously, and the abrasion of the end surface of the driving gear (9) and the end surface of the pump cover (1) is reduced; the outer diameter of a first thrust ball bearing (13) between the driven gear (10) and the pump cover (1) is smaller than the small diameter of the driven gear (10), so that the driven gear (10) and the first thrust ball bearing (13) rotate synchronously, and the abrasion of the end face of the driven gear (10) and the end face of the pump cover (1) is reduced; the outer diameter of a second thrust ball bearing (14) between the driving gear (9) and the base (3) is smaller than the small diameter of the driving gear (9), so that the driving gear (9) and the second thrust ball bearing (14) synchronously rotate, and the abrasion of the end surface of the driving gear (9) and the end surface of the base (3) is reduced; the outer diameter of a second thrust ball bearing (14) between the driven gear (10) and the base (3) is smaller than the small diameter of the driven gear (10), so that the driven gear (10) and the second thrust ball bearing (14) rotate synchronously, and the abrasion of the end face of the driven gear (10) and the end face of the base (3) is reduced.
4. The method for reducing wear of a helical gear pump with axial play compensation as set forth in claim 2, wherein the method for reducing wear of the gear shaft comprises the following specific steps: in the rotating process of the driving shaft (4) and the driven shaft (5), a first needle bearing (11) between the driving shaft (4) and the pump cover (1) and a second needle bearing (12) between the driving shaft (4) and the base (3) can reduce the abrasion loss of the driving shaft (4); the first needle bearing (11) between the driven shaft (5) and the pump cover (1) and the second needle bearing (12) between the driven shaft (5) and the base (3) can reduce the abrasion loss of the driven shaft (5).
5. Method for reducing wear in helical gear pumps with axial play compensation according to claim 2, characterized in that it comprises a spring rate design method of the compression spring (15) comprising the following steps:
step 1, dividing the whole working condition process of the helical gear pump;
step 101, determining a rotating speed range [ n ] of the helical gear pump during workinga,nb]And axial float travel range [ X ]a,Xb]；
102, equally dividing and dispersing a full working condition plane formed by the rotating speed and the axial movement stroke to obtain corresponding discrete working condition points [ n ] in the full working condition planem,Xn]Wherein n ismExpressed as a range of rotational speeds na,nb]Any rotational speed, X, corresponding to the discrete halvingnIndicating axial float travel range [ X ]a,Xb]Equally dividing any corresponding axial movement stroke in a discrete manner;
step 2, obtaining the axial force of the discrete working condition points;
step 201, adjusting the rotating speed in sequence to obtain the axial force of different discrete working condition points;
202, working strokes under different discrete working conditions are obtained according to different rotation speed values;
step 3, obtaining linear regression sample points of the rotating speed and the average axial force;
respectively calculating the axial forces of the discrete working points with the same working speed and different working strokes, and averaging
Obtaining a series of linear regression sample points of the rotating speed and the average axial force
Wherein the content of the first and second substances,
in the formula, F (n)m,Xn) Representing discrete operating points [ n ]m,Xn]The corresponding axial force, f, represents the number of equally divided working strokes;
step 4, performing linear fitting on the rotating speed and the average axial force;
using least square method or partial least square method to sample points
Performing linear regression to obtain linear regression equation of rotation speed and average axial force
Wherein the content of the first and second substances,
is nmCorresponding predicted values of regression average axial force, wherein k and b are regression coefficients;
step 5, according to the formula
Designing the spring stiffness K;
in the formula (I), the compound is shown in the specification,
is a rotational speed nbThe corresponding regression average axial force predicted value,
to turn toSpeed naCorresponding regression mean axial force prediction values.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111448785.5A CN114263599A (en) | 2021-11-30 | 2021-11-30 | Helical gear pump with axial play compensation and method for reducing wear thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111448785.5A CN114263599A (en) | 2021-11-30 | 2021-11-30 | Helical gear pump with axial play compensation and method for reducing wear thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756906A (en) * | 2021-08-18 | 2021-12-07 | 付俊杰 | Oil pump of internal combustion engine |
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| CN212155079U (en) * | 2020-04-30 | 2020-12-15 | 广西光裕新能源汽车空调压缩机有限公司 | Anti-channeling structure of swash plate type compressor main shaft |
| CN212643156U (en) * | 2020-07-06 | 2021-03-02 | 江门市甜的电器有限公司 | Water pump capable of reducing rotor play |
| CN113051736A (en) * | 2021-03-16 | 2021-06-29 | 长沙理工大学 | Proportional electromagnet reset spring stiffness design method |
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| CN113756906A (en) * | 2021-08-18 | 2021-12-07 | 付俊杰 | Oil pump of internal combustion engine |
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