CN211549972U - Stable unloading and stable oil transportation helical gear pump - Google Patents
Stable unloading and stable oil transportation helical gear pump Download PDFInfo
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- CN211549972U CN211549972U CN201922487580.2U CN201922487580U CN211549972U CN 211549972 U CN211549972 U CN 211549972U CN 201922487580 U CN201922487580 U CN 201922487580U CN 211549972 U CN211549972 U CN 211549972U
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Abstract
The utility model relates to a gear pump, especially a stable unloading oblique gear pump of steady oil transportation. The oil inlet and the oil outlet are arranged on two sides of the meshing position of the two bevel gears, an unloading groove is formed in the inner wall of the pump body, the unloading groove extends to the highest point and the lowest point of the inner wall of the pump body from the oil outlet, a through hole is formed in the pump body, and one of the rotating shafts stretches out of the pump body through the through hole. The pump can effectively reduce the impact on the pump body when pumping oil, and reduce fluctuation and noise, so that the oil is stably conveyed, and the service life of the gear pump is effectively prolonged.
Description
Technical Field
The utility model relates to a gear pump, especially a stable unloading oblique gear pump of steady oil transportation.
Background
The gear pump is a rotary pump which transfers or pressurizes liquid by means of a change in a displacement volume and a movement formed between a pump body and a meshing gear. The gear pump needs the fluid of oil inlet department to oil outlet department through the meshing gear pump in the course of the work, at the in-process of fluid pumping, because the pressure oil pocket at oil-out place when fluid pumping, the huge impact can be caused to the internal wall of pump to a large amount of fluid of surge, the undulant and the impact that the impact produced can further cause the pump noise, therefore have very big part in the gear pump body of damage to be in oil-out department, the pump body is under such operational environment, the life-span is lower.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stable oil transfer's of off-load oblique gear pump can effectively reduce the impact that the pump body received when pump sending fluid, reduces undulant and noise to make fluid carry steadily, effectively improve the life-span of gear pump.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a steady oil delivery's of stable off-load helical gear pump, includes the pump body, end cover, pivot and helical gear, it is connected with two pivots to rotate from top to bottom between the pump body and the end cover, can dismantle in the pivot and be connected with a pair of meshed helical gear, the addendum face and the contact of pump body inner wall of helical gear, pump body left and right sides is provided with oil inlet and oil-out respectively, oil inlet and oil-out set up the both sides in two helical gear meshing departments, pump body inner wall is provided with the off-load groove, the off-load groove extends to the peak and the minimum of pump body inner wall by the oil-out, the through-hole has.
In the oblique gear pump for stably unloading and stably conveying oil, the section of the unloading groove is in a V shape.
In the oblique gear pump for stably unloading and stably transporting oil, the cross section of the unloading groove is arc-shaped.
In the oblique gear pump for stably unloading and stably conveying oil, the cross section of the unloading groove is in a T shape.
In the oblique gear pump with stable unloading and stable oil transportation, at least two unloading grooves are arranged on the pump body in parallel.
In the oblique gear pump for stably unloading and stably conveying oil, the cross section size of the unloading groove is gradually increased from the highest point or the lowest point of the inner wall of the pump body to the oil outlet.
In the oblique gear pump for stably unloading and stably conveying oil, the projections of two adjacent teeth on the oblique gear in the axial direction are connected end to end.
In the oblique gear pump for stably unloading and smoothly conveying oil, the gear helix angle of the oblique gear is 9 degrees and 37 degrees.
In the above oblique gear pump with stable unloading and stable oil transportation, the gear transmission overlap coefficient of the two oblique gears is more than 1 and less than 2.
In the above oblique gear pump with stable unloading and stable oil transportation, the gear transmission overlap coefficient of the two oblique gears is 1.25.
Compared with the prior art, the utility model discloses an useful part lies in:
1) the utility model provides an oblique gear pump with stable unloading and stable oil transportation, which can effectively reduce the impact on the pump body when pumping oil, and reduce the fluctuation and noise, thereby stably transporting the oil and effectively prolonging the service life of the gear pump;
2) the pump body is provided with the unloading groove, and the unloading groove extends to the highest point and the lowest point of the inner wall of the pump body from the oil outlet, so that when the meshed helical gears pump oil from the oil inlet to the oil outlet and the oil enters the oil pressing cavity on the side of the oil outlet, the tooth top surface of the helical gear is still in contact with the inner wall of the pump body, a part of the oil can be released in advance with the help of the unloading groove, the oil is gradually released, the oil impact on the pump body is reduced, and the oil fluctuation and noise are reduced;
3) the section of the unloading groove is set to be V-shaped, so that oil can be smoothly conveyed to a pressure oil cavity where an oil outlet is located in advance, and the oil impact on the pump body is reduced;
4) the cross section of the unloading groove is set to be arc-shaped, so that oil can be smoothly conveyed to a pressure oil cavity where an oil outlet is located in advance, the oil impact on the pump body is reduced, the structural damage of the arc-shaped unloading groove to the pump body is small, and the structural strength and rigidity of the unloading groove can be maintained;
5) the cross section of the unloading groove is in a T shape, so that oil can be smoothly conveyed to a pressure oil cavity where an oil outlet is located in advance, the oil impact on a pump body is reduced, and the shape is convenient for machining of machine tool equipment;
6) by arranging at least two unloading grooves in parallel on the pump body, a plurality of unloading grooves are reasonably arranged according to the pressure applied to the oil pressing cavity, so that oil can be smoothly and pre-conveyed to the oil pressing cavity where the oil outlet is located;
7) the section size of the unloading groove is gradually increased from the highest point or the lowest point of the inner wall of the pump body to the oil outlet, so that the oil is gradually released into the oil pressure cavity in an increasing mode, sudden increase of the oil on the inner wall of the pump body at the oil outlet can be reduced, and the oil impact on the pump body is reduced;
8) the projections of two adjacent teeth on the helical gears in the axial direction are connected end to end, so that when the teeth of the two helical gears are sequentially separated from the highest point and the lowest point of the meshing position to be contacted with the inner wall of the pump body, the oil in one tooth space is released completely, and the oil in the next tooth space is released immediately, so that the oil is released continuously, the uneven oil release caused by the simultaneous release of the oil in a plurality of tooth spaces on the same side can be reduced, and the impact of the oil on the pump body is reduced;
9) the helical angle of the bevel gear is set to be 9 degrees 37', so that the helical gear is matched with the projections of the two adjacent gear teeth in the axial direction to be connected end to end, and the gear teeth of the bevel gear with the corresponding tooth width can be obtained, and the structural strength of the gear teeth of the bevel gear with the tooth width is high;
10) the gear transmission overlap coefficient of the two helical gears is larger than 1 and smaller than 2, so that the phenomenon that the helical gears are not connected in a transmission manner when the number of the helical gears is equal to 1 is avoided, and the phenomenon that gear teeth are blocked when the number of the helical gears is equal to 2 is also avoided;
11) by setting the gear transmission overlap factor to 1.25, a better overlap transmission effect can be achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view of the pump body of the present invention;
FIG. 3 is a schematic structural diagram of a bevel gear according to the present invention;
fig. 4 is a sectional view of an unloading groove in embodiment 1 of the present invention;
fig. 5 is a sectional view of an unloading groove in embodiment 2 of the present invention;
fig. 6 is a sectional view of an unloading groove in embodiment 3 of the present invention.
The meaning of the reference numerals: 1. a pump body; 2. an end cap; 3. a rotating shaft; 4. a helical gear; 5. an oil inlet; 6. an oil outlet; 7. an unloading slot; 8. and a through hole.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Detailed Description
The unloading groove 7 is formed in the pump body 1, and the unloading groove 7 extends from the oil outlet 6 to the highest point and the lowest point of the inner wall of the pump body 1, so that when the meshed helical gear 4 pumps oil from the oil inlet 5 to the oil outlet 6 and the oil enters the oil pressing cavity on the side of the oil outlet 6, the tooth top surface of the helical gear 4 is still in contact with the inner wall of the pump body 1, a part of the oil can be released in advance with the help of the unloading groove 7, the oil impact on the pump body 1 is reduced by gradually releasing the oil, and the fluctuation and noise of the oil are reduced.
According to the helical gear 4 pump capable of stably unloading and stably delivering oil, the section of the unloading groove 7 is V-shaped, and the section of the unloading groove 7 is V-shaped, so that oil can be smoothly delivered to a pressure oil cavity where the oil outlet 6 is located in advance, and the oil impact on the pump body 1 is reduced.
The helical gear 4 pump capable of stably unloading and stably conveying oil is characterized in that at least two unloading grooves 7 are arranged on the pump body 1 in parallel, and the unloading grooves 7 are arranged on the pump body 1 in parallel, so that a plurality of unloading grooves 7 are reasonably arranged according to the pressure applied to an oil pressing cavity, and oil can be smoothly conveyed to the oil pressing cavity where the oil outlet 6 is located in advance.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the cross section size of the unloading groove 7 is gradually increased from the highest point or the lowest point of the inner wall of the pump body 1 to the oil outlet 6, oil is gradually released into the oil pressing cavity in an increasing mode, sudden increase of the oil on the inner wall of the pump body 1 at the oil outlet 6 can be reduced, and oil impact on the pump body 1 is reduced.
The helical gear 4 pump of steady oil transportation of stable off-load, the two adjacent teeth of a cogwheel are at ascending projection end to end in the axial on the helical gear 4, through with the two adjacent teeth of a cogwheel are at ascending projection end to end in the axial on the helical gear 4 for the teeth of a cogwheel of two helical gears 4 are when the peak and the minimum of meshing department break away from in proper order and contact with 1 inner wall of the pump body, the fluid release in a tooth's socket finishes, and fluid in next tooth's socket is following closely the release, thereby make the fluid release continuous, can reduce the fluid of a plurality of tooth's sockets of the same side and release the fluid release inhomogeneous simultaneously that causes, thereby reduce fluid to the impact of the pump.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the gear helix angle of the helical gear 4 is 9 degrees 37 ', and the gear helix angle of the helical gear 4 is 9 degrees 37', so that the helical gear 4 is matched with the axial projections of the two adjacent gear teeth in an end-to-end mode, gear teeth of the helical gear 4 with the corresponding tooth width can be obtained, and the structural strength of the gear teeth of the gear with the tooth width is good.
The helical gear 4 pump for stably unloading and stably conveying oil is characterized in that the gear transmission overlap factor of the two helical gears 4 is larger than 1 and smaller than 2, and the gear transmission overlap factor of the two helical gears 4 is larger than 1 and smaller than 2, so that the phenomenon that the transmission of the helical gears 4 is not consistent when the number of the helical gears is equal to 1 is avoided, and the phenomenon that gear teeth are blocked when the number of the helical gears is equal to 2 is also avoided.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the gear transmission overlap coefficient of the two helical gears 4 is 1.25, and the gear transmission overlap coefficient is set to be 1.25, so that a better overlapping transmission effect can be achieved.
Example 2: the utility model provides a steady oil delivery's of stable off-load helical gear 4 pump, constitutes as shown in figure 1, figure 2, figure 3 and figure 5, including the pump body 1, end cover 2, pivot 3 and helical gear 4, it is connected with two pivot 3 to rotate from top to bottom between the pump body 1 and end cover 2, can dismantle in the pivot 3 and be connected with a pair of meshed helical gear 4, helical gear 4's addendum face and the contact of the 1 inner wall of the pump body, be provided with oil inlet 5 and oil-out 6 about the pump body 1 respectively, oil inlet 5 and oil-out 6 set up the both sides in two helical gear 4 meshing departments, the pump body 1 inner wall is provided with unloading groove 7, unloading groove 7 extends to the peak and the minimum of the pump body 1 inner wall by oil-out 6, through-hole 8 has been seted up on the pump body 1.
The unloading groove 7 is formed in the pump body 1, and the unloading groove 7 extends from the oil outlet 6 to the highest point and the lowest point of the inner wall of the pump body 1, so that when the meshed helical gear 4 pumps oil from the oil inlet 5 to the oil outlet 6 and the oil enters the oil pressing cavity on the side of the oil outlet 6, the tooth top surface of the helical gear 4 is still in contact with the inner wall of the pump body 1, a part of the oil can be released in advance with the help of the unloading groove 7, the oil impact on the pump body 1 is reduced by gradually releasing the oil, and the fluctuation and noise of the oil are reduced.
According to the helical gear 4 pump capable of stably unloading and stably delivering oil, the cross section of the unloading groove 7 is arc-shaped, and the cross section of the unloading groove 7 is arc-shaped, so that oil can be smoothly delivered to a pressure oil cavity where the oil outlet 6 is located in advance, the oil impact on the pump body 1 is reduced, the structural damage to the pump body 1 caused by the arc-shaped unloading groove 7 is small, and the structural strength and rigidity of the unloading groove 7 can be maintained.
The helical gear 4 pump capable of stably unloading and stably conveying oil is characterized in that at least two unloading grooves 7 are arranged on the pump body 1 in parallel, and the unloading grooves 7 are arranged on the pump body 1 in parallel, so that a plurality of unloading grooves 7 are reasonably arranged according to the pressure applied to an oil pressing cavity, and oil can be smoothly conveyed to the oil pressing cavity where the oil outlet 6 is located in advance.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the cross section size of the unloading groove 7 is gradually increased from the highest point or the lowest point of the inner wall of the pump body 1 to the oil outlet 6, oil is gradually released into the oil pressing cavity in an increasing mode, sudden increase of the oil on the inner wall of the pump body 1 at the oil outlet 6 can be reduced, and oil impact on the pump body 1 is reduced.
The helical gear 4 pump of steady oil transportation of stable off-load, the two adjacent teeth of a cogwheel are at ascending projection end to end in the axial on the helical gear 4, through with the two adjacent teeth of a cogwheel are at ascending projection end to end in the axial on the helical gear 4 for the teeth of a cogwheel of two helical gears 4 are when the peak and the minimum of meshing department break away from in proper order and contact with 1 inner wall of the pump body, the fluid release in a tooth's socket finishes, and fluid in next tooth's socket is following closely the release, thereby make the fluid release continuous, can reduce the fluid of a plurality of tooth's sockets of the same side and release the fluid release inhomogeneous simultaneously that causes, thereby reduce fluid to the impact of the pump.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the gear helix angle of the helical gear 4 is 9 degrees 37 ', and the gear helix angle of the helical gear 4 is 9 degrees 37', so that the helical gear 4 is matched with the axial projections of the two adjacent gear teeth in an end-to-end mode, gear teeth of the helical gear 4 with the corresponding tooth width can be obtained, and the structural strength of the gear teeth of the gear with the tooth width is good.
The helical gear 4 pump for stably unloading and stably conveying oil is characterized in that the gear transmission overlap factor of the two helical gears 4 is larger than 1 and smaller than 2, and the gear transmission overlap factor of the two helical gears 4 is larger than 1 and smaller than 2, so that the phenomenon that the transmission of the helical gears 4 is not consistent when the number of the helical gears is equal to 1 is avoided, and the phenomenon that gear teeth are blocked when the number of the helical gears is equal to 2 is also avoided.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the gear transmission overlap coefficient of the two helical gears 4 is 1.25, and the gear transmission overlap coefficient is set to be 1.25, so that a better overlapping transmission effect can be achieved.
Example 2: the utility model provides a steady oil delivery's of stable off-load helical gear 4 pump, constitutes as shown in figure 1, figure 2, figure 3 and figure 6, including the pump body 1, end cover 2, pivot 3 and helical gear 4, it is connected with two pivot 3 to rotate from top to bottom between the pump body 1 and end cover 2, can dismantle in the pivot 3 and be connected with a pair of meshed helical gear 4, helical gear 4's addendum face and the contact of the 1 inner wall of the pump body, be provided with oil inlet 5 and oil-out 6 about the pump body 1 respectively, oil inlet 5 and oil-out 6 set up the both sides in two helical gear 4 meshing departments, the pump body 1 inner wall is provided with unloading groove 7, unloading groove 7 extends to the peak and the minimum of the pump body 1 inner wall by oil-out 6, through-hole 8 has been seted up on the pump body 1.
The unloading groove 7 is formed in the pump body 1, and the unloading groove 7 extends from the oil outlet 6 to the highest point and the lowest point of the inner wall of the pump body 1, so that when the meshed helical gear 4 pumps oil from the oil inlet 5 to the oil outlet 6 and the oil enters the oil pressing cavity on the side of the oil outlet 6, the tooth top surface of the helical gear 4 is still in contact with the inner wall of the pump body 1, a part of the oil can be released in advance with the help of the unloading groove 7, the oil impact on the pump body 1 is reduced by gradually releasing the oil, and the fluctuation and noise of the oil are reduced.
According to the helical gear 4 pump capable of stably unloading and stably delivering oil, the cross section of the unloading groove 7 is T-shaped, and the cross section of the unloading groove 7 is T-shaped, so that oil can be smoothly delivered to a pressure oil cavity where the oil outlet 6 is located in advance, the oil impact on the pump body 1 is reduced, and the shape is convenient for machining of machine tool equipment.
The helical gear 4 pump capable of stably unloading and stably conveying oil is characterized in that at least two unloading grooves 7 are arranged on the pump body 1 in parallel, and the unloading grooves 7 are arranged on the pump body 1 in parallel, so that a plurality of unloading grooves 7 are reasonably arranged according to the pressure applied to an oil pressing cavity, and oil can be smoothly conveyed to the oil pressing cavity where the oil outlet 6 is located in advance.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the cross section size of the unloading groove 7 is gradually increased from the highest point or the lowest point of the inner wall of the pump body 1 to the oil outlet 6, oil is gradually released into the oil pressing cavity in an increasing mode, sudden increase of the oil on the inner wall of the pump body 1 at the oil outlet 6 can be reduced, and oil impact on the pump body 1 is reduced.
The helical gear 4 pump of steady oil transportation of stable off-load, the two adjacent teeth of a cogwheel are at ascending projection end to end in the axial on the helical gear 4, through with the two adjacent teeth of a cogwheel are at ascending projection end to end in the axial on the helical gear 4 for the teeth of a cogwheel of two helical gears 4 are when the peak and the minimum of meshing department break away from in proper order and contact with 1 inner wall of the pump body, the fluid release in a tooth's socket finishes, and fluid in next tooth's socket is following closely the release, thereby make the fluid release continuous, can reduce the fluid of a plurality of tooth's sockets of the same side and release the fluid release inhomogeneous simultaneously that causes, thereby reduce fluid to the impact of the pump.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the gear helix angle of the helical gear 4 is 9 degrees 37 ', and the gear helix angle of the helical gear 4 is 9 degrees 37', so that the helical gear 4 is matched with the axial projections of the two adjacent gear teeth in an end-to-end mode, gear teeth of the helical gear 4 with the corresponding tooth width can be obtained, and the structural strength of the gear teeth of the gear with the tooth width is good.
The helical gear 4 pump for stably unloading and stably conveying oil is characterized in that the gear transmission overlap factor of the two helical gears 4 is larger than 1 and smaller than 2, and the gear transmission overlap factor of the two helical gears 4 is larger than 1 and smaller than 2, so that the phenomenon that the transmission of the helical gears 4 is not consistent when the number of the helical gears is equal to 1 is avoided, and the phenomenon that gear teeth are blocked when the number of the helical gears is equal to 2 is also avoided.
According to the helical gear 4 pump capable of stably unloading and stably conveying oil, the gear transmission overlap coefficient of the two helical gears 4 is 1.25, and the gear transmission overlap coefficient is set to be 1.25, so that a better overlapping transmission effect can be achieved.
The utility model discloses a theory of operation:
the utility model discloses a through with the pump body 1, end cover 2, pivot 3 and helical gear 4 organic package, set up the off-load groove 7 that is used for the pressure release on the pump body 1 to form the helical gear 4 pump of the steady oil transportation of stable off-load, thereby can effectively reduce the impact that pump body 1 received when the pump sending fluid, reduce undulant and noise, thereby make fluid steadily carry, effectively improve the life-span of gear pump. The utility model discloses a set up off-load groove 7 on pump body 1, off-load groove 7 extends to the peak and the minimum of pump body 1 inner wall by oil-out 6 to make the in-process that engaged helical gear 4 was sent fluid from oil inlet 5 to oil-out 6, when fluid entered into the pressure oil chamber of oil-out 6 this side, tooth addendum face on helical gear 4 was still in the contact time with pump body 1 inner wall, can release a part of fluid in advance under the help of off-load groove 7, thereby reduce the fluid impact that pump body 1 received through releasing fluid gradually, reduce fluid fluctuation and noise; the section of the unloading groove 7 is designed to be V-shaped, so that oil can be smoothly conveyed to a pressure oil cavity where the oil outlet 6 is located in advance, and the oil impact on the pump body 1 is reduced; the cross section of the unloading groove 7 is designed to be arc-shaped, so that oil can be smoothly delivered to a pressure oil cavity where the oil outlet 6 is located in advance, the oil impact on the pump body 1 is reduced, the structural damage of the arc-shaped unloading groove 7 to the pump body 1 is small, and the structural strength and rigidity of the unloading groove 7 can be kept; the cross section of the unloading groove 7 is in a T shape, so that oil can be smoothly conveyed to a pressure oil cavity where the oil outlet 6 is located in advance, the oil impact on the pump body 1 is reduced, and the shape is convenient for machining of machine tool equipment; by arranging at least two unloading grooves 7 in parallel on the pump body 1 and reasonably arranging a plurality of unloading grooves 7 according to the pressure applied to the oil pressing cavity, the oil can be smoothly and pre-conveyed to the oil pressing cavity where the oil outlet 6 is positioned; the section size of the unloading groove 7 is gradually increased from the highest point or the lowest point of the inner wall of the pump body 1 to the oil outlet 6, so that oil is gradually released into the oil pressure cavity in an increasing mode, sudden increase of the oil on the inner wall of the pump body 1 at the oil outlet 6 can be reduced, and oil impact on the pump body 1 is reduced; the projections of two adjacent teeth on the helical gears 4 in the axial direction are connected end to end, so that when the teeth of the two helical gears 4 are sequentially separated from the highest point and the lowest point of the meshing position to be contacted with the inner wall of the pump body 1, oil in one tooth space is released completely, and oil in the next tooth space is released immediately, so that the oil is released continuously, uneven oil release caused by simultaneous release of oil in a plurality of tooth spaces on the same side can be reduced, and the impact of the oil on the pump body 1 is reduced; the helical angle of the bevel gear 4 is set to be 9 degrees 37', so that the projections of the two adjacent teeth in the axial direction are matched with each other end to end, and the teeth of the bevel gear 4 with the corresponding tooth width can be obtained, and the structural strength of the teeth of the gear with the tooth width is high; the gear transmission overlap coefficient of the two bevel gears 4 is larger than 1 and smaller than 2, so that the phenomenon that the transmission of the bevel gears 4 is not connected when the transmission is equal to 1 is avoided, and the phenomenon that gear teeth are blocked when the transmission is equal to 2 is also avoided; by setting the gear transmission overlap factor to 1.25, a better overlap transmission effect can be achieved.
Claims (10)
1. The helical gear (4) pump is characterized by comprising a pump body (1), an end cover (2), two rotating shafts (3) and helical gears (4), wherein the two rotating shafts (3) are rotatably connected between the pump body (1) and the end cover (2) from top to bottom, the rotating shafts (3) are detachably connected with a pair of meshed helical gears (4), the tooth addendum surfaces of the helical gears (4) are in contact with the inner wall of the pump body (1), the left side and the right side of the pump body (1) are respectively provided with an oil inlet (5) and an oil outlet (6), the oil inlet (5) and the oil outlet (6) are arranged on two sides of the meshing part of the two helical gears (4), the inner wall of the pump body (1) is provided with an unloading groove (7), the unloading groove (7) extends to the highest point and the lowest point of the inner wall of the pump body (1) from the oil outlet (6, one of the rotating shafts (3) extends out of the pump body (1) through the through hole (8).
2. The helical gear (4) pump with stable unloading and smooth oil transportation according to claim 1, wherein the cross-sectional shape of the unloading groove (7) is a V shape.
3. The helical gear (4) pump with stable unloading and smooth oil transportation according to claim 1, wherein the cross-sectional shape of the unloading groove (7) is a circular arc.
4. The helical gear (4) pump with stable unloading and smooth oil transportation according to claim 1, wherein the cross-sectional shape of the unloading groove (7) is "T" shaped.
5. The helical gear (4) pump with stable unloading and smooth oil delivery according to the claim 1, 2, 3 or 4, characterized in that the unloading groove (7) is provided with at least two parallel grooves on the pump body (1).
6. The helical gear (4) pump with stable unloading and smooth oil delivery according to claim 5, characterized in that the cross-sectional size of the unloading groove (7) is gradually increased from the highest point or the lowest point of the inner wall of the pump body (1) to the oil outlet (6).
7. The bevel gear pump (4) for stable unloading and smooth oil transportation according to claim 6, wherein the projections of two adjacent teeth on the bevel gear (4) in the axial direction are connected end to end.
8. The bevel gear pump (4) for stable unloading and smooth oil transportation according to claim 7, characterized in that the gear helix angle of said bevel gear (4) is 9 ° 37'.
9. The helical gear (4) pump with stable unloading and smooth oil transportation according to claim 8, wherein the gear transmission overlap factor of the two helical gears (4) is more than 1 and less than 2.
10. The helical gear (4) pump with stable unloading and smooth oil transportation according to claim 9, characterized in that the gear transmission overlap factor of the two helical gears (4) is 1.25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922487580.2U CN211549972U (en) | 2019-12-31 | 2019-12-31 | Stable unloading and stable oil transportation helical gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922487580.2U CN211549972U (en) | 2019-12-31 | 2019-12-31 | Stable unloading and stable oil transportation helical gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211549972U true CN211549972U (en) | 2020-09-22 |
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ID=72512920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922487580.2U Active CN211549972U (en) | 2019-12-31 | 2019-12-31 | Stable unloading and stable oil transportation helical gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211549972U (en) |
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2019
- 2019-12-31 CN CN201922487580.2U patent/CN211549972U/en active Active
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