Improved high-performance fuel pump

Abstract

The improved high-performance fuel pump comprises a volute, an impeller and a rotating shaft, the impeller comprises a front disc, a rear disc, blades and a hub, the multiple blades are distributed in the circumferential direction and connected between the front disc and the rear disc, the hub is arranged on the radial inner side of the rear disc, and the volute is provided with a rear side wall; the flow guide plate is characterized in that the outer side face of the rear plate is connected with a back side plate, a plurality of auxiliary flow channels are formed in the back side plate, each auxiliary flow channel is provided with an inlet hole in the radial inner side and an outlet hole in the radial outer side, the radial inner side of the back side plate is connected with an adjusting ring, the adjusting ring can move axially, and the opening degree or the through-flow area of the inlet holes can be adjusted. The axial force of the fuel pump can be adjusted, the pressure distribution can be adjusted, the flow loss can be reduced, and the vibration can be reduced, so that the hydraulic performance and the operation efficiency of the fuel pump can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid pumps, and in particular to an improved high-performance fuel pump. Background Art

[0002] The existing fuel pump includes a volute, a centrifugal impeller, and a rotating shaft. The impeller is mounted on the rotating shaft and rotatably mounted in the volute. The impeller includes a front disc, a rear disc, blades, and a hub. A plurality of blades are distributed along the circumference and connected between the front disc and the rear disc. A hub is provided on the radial inner side of the rear disc, and the hub is mounted on the rotating shaft. The volute has a front side wall and a rear side wall, and the rear side wall is provided corresponding to the rear disc. However, the existing fuel pump still has problems such as poor axial force and pressure distribution adjustment effect, large flow loss, and the hydraulic performance and operation efficiency need to be further improved. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an improved high-performance fuel pump, which, through the design of the adjustment ring and the return path, can automatically move axially left and right under the joint action of the liquid pressure and the elastic force of the spring according to the different liquid pressures, thereby adjusting the opening of the auxiliary flow channel inlet hole and the sealing gap of the sealing ring. It can adjust the axial force of the fuel pump, adjust the pressure distribution, reduce flow loss, and reduce vibration, thereby improving the hydraulic performance and operating efficiency of the fuel pump.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An improved high-performance fuel pump comprises a volute, an impeller and a rotating shaft. The impeller comprises a front disc, a rear disc, blades and a hub. A plurality of blades are distributed circumferentially and connected between the front disc and the rear disc. A hub is arranged on the radial inner side of the rear disc. The volute has a rear side wall. The invention is characterized in that the outer side surface of the rear disc is connected or fixedly connected to a dorsal disc, a plurality of auxiliary flow channels are arranged in the dorsal disc, the auxiliary flow channels have an inlet hole on the radial inner side and an outlet hole on the radial outer side, an adjustment ring is connected to the radial inner side of the dorsal disc, the adjustment ring can move axially and can adjust or control the opening or flow area of ​​the inlet hole.

[0006] Furthermore, a plurality of grooves are provided at the radial inner end of the dorsal disk, and the adjustment ring includes a ring body, a guide protrusion, a sealing ring, and a spring. The outer peripheral surface of the ring body is provided with a plurality of guide protrusions distributed along the circumferential direction. The spring is arranged in the groove, one end of the spring is connected to the side wall of the groove, and the other end is connected to the guide protrusion. A sealing ring is provided on the right end surface of the ring body, and the sealing ring is sealed with the rear side wall. A reflux inlet channel is provided at the center of the ring body.

[0007] Furthermore, multiple grooves are distributed along the circumferential direction, and the multiple grooves are arranged one-to-one with the multiple guide protrusions; in the circumferential direction, multiple guide protrusions and multiple auxiliary flow channels are arranged alternately or at intervals; the multiple auxiliary flow channels are evenly distributed along the circumferential direction and extend radially, and the cross-section of the auxiliary flow channels is rectangular or elliptical.

[0008] Furthermore, a balancing hole is provided on the rear disc or the wheel hub, and a plurality of balancing holes are distributed along the circumferential direction; the reflux inlet channel is a tapered hole, and the diameter of one end of the tapered hole adjacent to the balancing hole is larger than the diameter of the other end.

[0009] Furthermore, the reflux path includes a reflux path one and a reflux path two. The reflux path one is: the back pressure chamber between the dorsal disk and the rear side wall → the sealing ring → the reflux inlet channel → the auxiliary flow channel → the diffuser or the pressure water chamber; the reflux path two is: the back pressure chamber between the dorsal disk and the rear side wall → the sealing ring → the reflux inlet channel → the balancing hole → the impeller inner cavity.

[0010] Furthermore, the left end face of the adjusting ring is connected to a connecting rod, and the other end of the connecting rod is connected to a conical head. The conical head and the connecting rod are at least partially arranged in the balancing hole. The conical head and the connecting rod can move axially with the adjusting ring. During the axial movement, the conical head can adjust or control the opening or flow area of ​​the balancing hole.

[0011] Furthermore, the plurality of conical heads are arranged in one-to-one correspondence with the plurality of balancing holes, and the diameter of the conical head adjacent to one end of the connecting rod is small, and the diameter of the other end is large.

[0012] Furthermore, one end of the connecting rod is threadedly connected to the adjusting ring, and the other end is threadedly connected to the conical head.

[0013] Furthermore, the right side surface of the auxiliary flow channel is flush with the inner side surface of the diffuser at the corresponding position, the outer diameter of the back disk is equal to the outer diameter of the rear disk and the blades, the diameter at the center of the balance hole is smaller than the outer diameter of the sealing ring, and the outer diameter of the sealing ring is smaller than the outer diameter of the ring body or the outer diameter of the guide protrusion.

[0014] The improved high-performance fuel pump of the present invention, through the design of the adjusting ring and the return path, under the joint action of the liquid pressure and the elastic force of the spring, according to the different liquid pressures, the adjusting ring can automatically move axially left and right, so as to adjust the opening of the auxiliary flow channel inlet hole and the sealing gap of the sealing ring. It can adjust the axial force of the fuel pump, adjust the pressure distribution, reduce flow loss, reduce vibration, and thus improve the hydraulic performance and operation efficiency of the fuel pump.

[0015] The present invention adopts the design of the conical head and the connecting rod, and when the adjusting ring moves axially, the conical head can adjust or control the opening or flow area of ​​the balancing hole, which can further adjust the axial force of the fuel pump, adjust the pressure distribution, further reduce the flow loss, reduce the vibration, and thus further improve the hydraulic performance and operation efficiency of the fuel pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the improved high-performance fuel pump of the present invention;

[0017] Figure 2 It is a partial enlarged structural schematic diagram of the improved high-performance fuel pump of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the adjustment ring of the improved high-performance fuel pump of the present invention.

[0019] In the figure: volute 1, centrifugal impeller 2, rotating shaft 3, dorsal disc 4, adjusting ring 5, rear side wall 11, front disc 21, rear disc 22, blades 23, hub 24, balancing hole 25, auxiliary flow channel 41, groove 42, guide protrusion 51, sealing ring 52, spring 53, connecting rod 54, conical head 55. DETAILED DESCRIPTION

[0020] In order to make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present invention, which are only used to explain the present invention, not to limit the present invention. It should be noted that, for the convenience of description, only the parts / structures related to the present invention are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention should be the common meanings understood by ordinary technicians in the field to which the present invention belongs.

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-3As shown, an improved high-performance fuel pump comprises a volute 1, a centrifugal impeller 2, and a rotating shaft 3. The impeller 2 is mounted on the rotating shaft 3 and rotatably mounted in the volute 1. The impeller 2 comprises a front disc 21, a rear disc 22, blades 23, and a hub 24. A plurality of blades 23 are distributed along the circumferential direction and connected between the front disc 21 and the rear disc 22. A hub 24 is arranged on the radial inner side of the rear disc 22, and the hub 24 is mounted on the rotating shaft 3. The volute 1 comprises a front side wall and a rear side wall 11, and the rear side wall 11 is arranged corresponding to the rear disc 22; it is characterized in that: the outer side surface of the rear disc 22 is connected or fixedly connected to the dorsal disc 4, and a plurality of auxiliary flow channels 41 are opened in the dorsal disc 4, and the auxiliary flow channels 41 have an inlet hole on the radial inner side and an outlet hole on the radial outer side thereof. An adjusting ring 5 is connected to the radial inner side of the dorsal disc 4, and the adjusting ring 5 can move axially and can adjust or control the opening or flow area of ​​the inlet hole.

[0024] Furthermore, a plurality of grooves or slide grooves 42 are provided at the radial inner end of the dorsal disk 4, and the adjusting ring 5 includes a ring body, a guide protrusion 51, a sealing ring 52, and a spring 53. The outer peripheral surface of the ring body is provided with a plurality of guide protrusions 51 distributed along the circumferential direction, and the spring 53 is arranged in the groove 42. One end of the spring 53 is connected to the side wall of the groove 42, and the other end is connected to the guide protrusion 51. A sealing ring 52 is provided on the right end surface of the ring body, and the sealing ring 52 is sealed with the rear side wall 11. A reflux inlet channel is provided in the center of the ring body.

[0025] The plurality of grooves 42 are distributed along the circumferential direction, and the plurality of grooves 42 are arranged in one-to-one correspondence with the plurality of guide protrusions 51 ; in the circumferential direction, the plurality of guide protrusions 51 and the plurality of auxiliary flow channels 41 are arranged alternately or at intervals.

[0026] The plurality of auxiliary flow channels 41 are evenly distributed along the circumferential direction and extend along the radial direction. The cross section of the auxiliary flow channel 41 is rectangular or elliptical.

[0027] The rear disc 22 or the wheel hub 24 is provided with balancing holes 25 , and a plurality of balancing holes 25 are distributed along the circumferential direction.

[0028] The reflux inlet channel is a tapered hole, and the diameter of one end of the tapered hole adjacent to the balancing hole 25 is larger than the diameter of the other end.

[0029] like Figure 1-2 As shown, the arrow “→” indicates the direction of liquid flow, and the reflux path includes a reflux path one and a reflux path two. The reflux path one is: the back pressure cavity between the back disk 4 and the rear side wall 11 → the sealing ring 52 → the reflux inlet channel → the auxiliary flow channel 41 → the diffuser or the pressure water chamber; the reflux path two is: the back pressure cavity between the back disk 4 and the rear side wall 11 → the sealing ring 52 → the reflux inlet channel → the balance hole 25 → the impeller inner cavity.

[0030] The improved high-performance fuel pump of the present invention, through the design of the adjusting ring 5 and the return path, under the joint action of the liquid pressure and the elastic force of the spring 53, according to the different liquid pressures, the adjusting ring 5 can automatically move axially left and right, so as to adjust the opening of the inlet hole of the auxiliary flow channel 41 and the sealing gap of the sealing ring 52. It can adjust the axial force of the fuel pump, adjust the pressure distribution, reduce flow loss, reduce vibration, and thus improve the hydraulic performance and operation efficiency of the fuel pump.

[0031] Furthermore, the left end face of the adjusting ring 5 is connected to a connecting rod 54, and the other end of the connecting rod 54 is connected to a conical head 55. The conical head 55 and the connecting rod 54 are at least partially arranged in the balancing hole 25. The conical head 55 and the connecting rod 54 can move axially with the adjusting ring 5. During the axial movement, the conical head 55 can adjust or control the opening or flow area of ​​the balancing hole 25.

[0032] The plurality of conical heads 55 are arranged corresponding to the plurality of balancing holes 25 . The conical head 55 has a small diameter at one end adjacent to the connecting rod 54 and a large diameter at the other end.

[0033] One end of the connecting rod 54 is threadedly connected to the adjusting ring 5, and the other end is threadedly connected to the conical head 55, so that installation / disassembly is convenient.

[0034] The present invention adopts the design of the conical head 55 and the connecting rod 54, and when the adjusting ring 5 moves axially, the conical head 55 can adjust or control the opening or flow area of ​​the balancing hole 25. It can further adjust the axial force of the fuel pump, adjust the pressure distribution, further reduce the flow loss, reduce the vibration, and thus further improve the hydraulic performance and operation efficiency of the fuel pump.

[0035] like Figure 2 As shown, the right side surface of the auxiliary flow channel 41 is flush with the inner side surface of the diffuser at the corresponding position, the outer diameter of the dorsal disk 4 is equal to the outer diameters of the rear disk 22 and the blades 23, the diameter at the center of the balancing hole 25 is smaller than the outer diameter of the sealing ring 52, and the outer diameter of the sealing ring 52 is smaller than the outer diameter of the ring body or the outer diameter of the guide protrusion 51.

[0036] In one embodiment, the number of the guide protrusions 51 is less than the number of the auxiliary flow channels 41 .

[0037] The fuel pump is a centrifugal pump, and the impeller 2 is a centrifugal impeller.

[0038] The improved high-performance fuel pump of the present invention, through the design of the adjusting ring 5 and the return path, under the joint action of the liquid pressure and the elastic force of the spring 53, according to the different liquid pressures, the adjusting ring 5 can automatically move axially left and right, so as to adjust the opening of the inlet hole of the auxiliary flow channel 41 and the sealing gap of the sealing ring 52. It can adjust the axial force of the fuel pump, adjust the pressure distribution, reduce flow loss, reduce vibration, and thus improve the hydraulic performance and operation efficiency of the fuel pump.

[0039] The present invention adopts the design of the conical head 55 and the connecting rod 54, and when the adjusting ring 5 moves axially, the conical head 55 can adjust or control the opening or flow area of ​​the balancing hole 25. It can further adjust the axial force of the fuel pump, adjust the pressure distribution, further reduce the flow loss, reduce the vibration, and thus further improve the hydraulic performance and operation efficiency of the fuel pump.

[0040] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An improved high-performance fuel pump, comprising a volute (1), an impeller (2), and a rotating shaft (3), wherein the impeller comprises a front disc (21), a rear disc (22), blades (23), and a hub (24), wherein a plurality of blades are distributed along the circumferential direction and connected between the front disc and the rear disc, a hub is provided on the radial inner side of the rear disc, and the volute has a rear side wall (11); characterized in that: The outer side of the rear disc is connected to a dorsal disc (4), and a plurality of auxiliary flow channels (41) are provided in the dorsal disc. The auxiliary flow channels have an inlet hole on the radial inner side and an outlet hole on the radial outer side. The radial inner side of the dorsal disc is connected to an adjustment ring (5), which can move axially and adjust the opening or flow area of ​​the inlet hole.

2. An improved high performance fuel pump as claimed in claim 1, characterized in that: A plurality of grooves (42) are provided at the radial inner end of the back disk. The adjusting ring comprises a ring body, a guide protrusion (51), a sealing ring (52), and a spring (53). The outer peripheral surface of the ring body is provided with a plurality of guide protrusions distributed along the circumferential direction. The spring is provided in the groove. One end of the spring is connected to the side wall of the groove, and the other end is connected to the guide protrusion. A sealing ring is provided on the right end surface of the ring body. The sealing ring is sealed with the rear side wall. A reflux inlet channel is provided at the center of the ring body.

3. An improved high performance fuel pump as claimed in claim 2, characterized in that: Multiple grooves are distributed along the circumferential direction, and the multiple grooves are arranged in one-to-one correspondence with the multiple guide protrusions; in the circumferential direction, the multiple guide protrusions and the multiple auxiliary flow channels are arranged alternately or at intervals; the multiple auxiliary flow channels are evenly distributed along the circumferential direction and extend radially, and the cross-section of the auxiliary flow channels is rectangular or elliptical.

4. An improved high performance fuel pump as claimed in claim 3, characterized in that: The rear disc or the wheel hub is provided with a balancing hole (25), and a plurality of balancing holes are distributed along the circumferential direction; the reflux inlet channel is a tapered hole, and the diameter of one end of the tapered hole adjacent to the balancing hole is larger than the diameter of the other end.

5. An improved high performance fuel pump as claimed in claim 4, characterized in that: The return path includes a return path 1 and a return path 2. The return path 1 is: the back pressure cavity between the back disk (4) and the rear wall (11) → the sealing ring (52) → the return inlet channel → the auxiliary flow channel (41) → the diffuser or the pressure water chamber; the return path 2 is: the back pressure cavity between the back disk and the rear wall → the sealing ring → the return inlet channel → the balance hole (25) → the impeller inner cavity.

6. An improved high performance fuel pump as claimed in claim 5, characterized in that: The left end face of the adjusting ring is connected with a connecting rod (54), and the other end of the connecting rod is connected with a conical head (55). The conical head and the connecting rod are at least partially arranged in the balancing hole. The conical head and the connecting rod can move axially with the adjusting ring. When moving axially, the conical head can adjust or control the opening or flow area of ​​the balancing hole.

7. An improved high performance fuel pump as claimed in claim 6, characterized in that: The plurality of conical heads are arranged correspondingly to the plurality of balancing holes. The diameter of the conical head adjacent to one end of the connecting rod is small, and the diameter of the other end is large.

8. An improved high performance fuel pump as claimed in claim 7, characterized in that: One end of the connecting rod is threadedly connected to the adjusting ring, and the other end is threadedly connected to the conical head.

9. An improved high performance fuel pump as claimed in claim 6, characterized in that: The right side of the auxiliary flow channel (41) is flush with the inner side of the diffuser at the corresponding position, the outer diameter of the back disk is equal to the outer diameter of the rear disk and the blades, the diameter at the center of the balance hole is smaller than the outer diameter of the sealing ring, and the outer diameter of the sealing ring is smaller than the outer diameter of the ring body or the outer diameter of the guide protrusion.

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