CN212717148U - Rotor for vane pump, vane pump and high-pressure fuel pump - Google Patents
Rotor for vane pump, vane pump and high-pressure fuel pump Download PDFInfo
- Publication number
- CN212717148U CN212717148U CN202021182257.0U CN202021182257U CN212717148U CN 212717148 U CN212717148 U CN 212717148U CN 202021182257 U CN202021182257 U CN 202021182257U CN 212717148 U CN212717148 U CN 212717148U
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- rotor
- pump
- key
- pump shaft
- vane
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- 239000000446 fuel Substances 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 230000013011 mating Effects 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The utility model provides a rotor for vane pump. The rotor includes: at least one keyway for receiving a key, wherein the key is for connecting the rotor to a pump shaft of the vane pump to transmit torque between the rotor and the pump shaft; and a buffer structure provided in the body of the rotor for reducing impact of the key on the rotor. The utility model discloses still provide the impeller pump including this kind of rotor to and a high pressure fuel pump. According to the utility model discloses, can reduce the impact of key to the rotor when the moment of torsion takes place undulant, and then reduce the butt joint keyway of keyway, key, pump shaft of rotor and even the damage risk of rotor and pump shaft to the life of extension rotor, key and pump shaft.
Description
Technical Field
The present invention relates to a rotor for a vane pump, and a vane pump comprising such a rotor. The utility model discloses still relate to a high pressure fuel pump.
Background
Vane pumps are widely used in a variety of devices for supplying a liquid medium, such as fuel, to the device at a desired pressure and flow rate. A vane pump generally includes a stator and a rotor eccentrically disposed in the stator and capable of rotating. Fig. 1 shows a prior art rotor 1 for a vane pump, comprising a substantially cylindrical body 3. A plurality of vane grooves 7 are formed in the body 3 extending radially inward from the outer peripheral surface 5 for receiving the vanes. A shaft hole 9 is formed centrally in the body 3 for allowing a pump shaft of the vane pump to protrude. The shaft hole 9 also defines an inner peripheral surface 11 of the body 3. The body 3 further includes a key groove 13 formed in the body 3 to extend outward from the inner peripheral surface 11. And a butt key groove matched with the key groove 13 is formed in the pump shaft. When assembling the vane pump, the pump shaft extends into the shaft hole 9 of the rotor 1, the key is disposed in the key groove 13 of the rotor 1 and partially protrudes out of the key groove 13, and the portion of the key protruding out of the key groove 13 is received in the butt key groove of the pump shaft, whereby the rotor 1 is mounted to the pump shaft to be driven by the pump shaft. The rotor 1, the pump shaft and the key are made of metal materials. When the pump shaft drives the rotor 1 to rotate, the torque of the pump shaft is transmitted to the rotor 1 through the key. Due to errors in operation or other reasons, the torque transmitted from the pump shaft through the key may fluctuate, which can create impacts between the key slot 13 of the rotor 1, the key and the mating key slot of the pump shaft. Long-term impacts can cause damage to the keyways 13, keys and mating keyways, and even to the rotor 1 and pump shaft.
Thus, there is a need for improvements to existing rotors to reduce the risk of such damage.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome among the prior art impeller pump's rotor and keyway, key and pump shaft and its butt joint keyway damaged problem easily.
In order to accomplish the above object, according to an aspect of the present invention, there is provided a rotor for a vane pump, including:
a body having a first end face, a second end face opposite the first end face, and an outer peripheral surface extending between the first end face and the second end face;
a plurality of blade grooves formed in the body extending inwardly from the outer peripheral surface for receiving blades;
a shaft hole formed centrally in the body for allowing a pump shaft of the vane pump to extend into;
characterized in that the rotor further comprises:
at least one keyway for receiving a key, wherein the key is for connecting the rotor to the pump shaft to transmit torque between the rotor and the pump shaft; and
a buffer structure disposed in the body for reducing impact of the key on the rotor.
Preferably, the cushioning structure is made of a flexible material.
Preferably, the shaft bore defines an inner circumferential surface of the body, the buffer structure is disposed at least partially around the inner circumferential surface and is configured to receive the pump shaft, and the at least one key slot is formed in the buffer structure.
Preferably, the rotor is a multi-piece rotor and the body includes at least an inner ring portion and an outer ring portion that nests outside the inner ring portion, the cushioning structure being disposed between the outer ring portion and the inner ring portion and connecting the outer ring portion and the inner ring portion together so that they can rotate together.
Preferably, the flexible material is a rubber material.
Preferably, the cushioning structure is formed by removing a portion of the body.
Preferably, the relief structure is formed by at least one hole in the body extending through the body from the first end face to the second end face.
According to another aspect of the present invention, there is provided a vane pump, comprising:
a stator;
the aforementioned rotor, which is eccentrically disposed in the stator; and
a plurality of vanes received in the plurality of vane slots of the rotor;
a pump shaft extending into the shaft hole of the rotor;
the at least one keyway of the rotor mates with a mating keyway of the pump shaft to receive a key to mount the rotor to the pump shaft and enable the rotor to rotate with the pump shaft relative to the stator.
According to another aspect of the present invention, there is provided a high pressure fuel pump, comprising the vane pump and at least one plunger pump in fluid communication with the vane pump.
Preferably, the vane pump and the at least one plunger pump share the same pump shaft.
According to the utility model discloses, can reduce the impact of key to the rotor when the moment of torsion takes place undulant, and then reduce the butt joint keyway of keyway, key, pump shaft of rotor and even the damage risk of rotor and pump shaft to the life of extension rotor, key and pump shaft.
Drawings
The above-described and other aspects of the present invention will be more fully understood and appreciated in view of the accompanying drawings. It should be noted that the figures are merely schematic and are not drawn to scale. In the drawings:
FIG. 1 is a schematic end view of a prior art rotor for a vane pump;
FIG. 2 is a schematic end view of a rotor for a vane pump according to a first embodiment of the present application;
FIG. 3 illustrates a high pressure fuel pump using the rotor shown in FIG. 2 with a portion of the housing removed to show the rotor therein;
FIG. 4 is a schematic end view of a rotor for a vane pump according to a second embodiment of the present application;
FIG. 5 is a schematic end view of a rotor for a vane pump according to a third embodiment of the present application; and
fig. 6 is a schematic end view of a rotor for a vane pump according to a fourth embodiment of the present application.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to examples. It will be understood by those skilled in the art that these exemplary embodiments are not meant to form any limitation of the present invention.
Fig. 2 shows a rotor 101 for a vane pump according to a first embodiment of the present application. The rotor 101 may include a body 103, the body 103 being generally cylindrical in shape and having a first end face, a second end face opposite the first end face, and an outer peripheral surface 105 extending between the first and second end faces. The body 103 may be made of a metallic material, preferably steel. A plurality of vane slots 107 may be formed in the body 103 extending radially inward from the outer peripheral surface 105 for receiving vanes. A shaft hole 109 may be formed centrally in the body 103 for allowing a pump shaft of the vane pump to extend into. The rotor 101 may also include at least one keyway 113 (a single keyway is shown in fig. 2). The keyway 113 is for mating with a mating keyway of the pump shaft to receive a corresponding key to mount the rotor 101 to the pump shaft and to transmit torque between the rotor 101 and the pump shaft. The shaft hole 109 also defines an inner circumferential surface 111 of the body 103.
To reduce the risk that the rotor, keys and pump shaft are easily damaged when torque fluctuations occur, the rotor 101 may further include a buffer structure 115 provided in the body 103 for reducing shock. In the embodiment shown in fig. 2, the cushioning structure 115 is made of a flexible material. In the present application, a flexible material refers to a material capable of absorbing impact while transmitting torque. The flexible material is preferably a non-metallic flexible material, more preferably a rubber material. As shown in fig. 2, a buffer structure 115 made of a flexible material may be disposed around the inner circumferential surface 111 of the body 103, and a key groove 113 is formed in the buffer structure 115. The buffer structure 115 may be attached to the inner circumferential surface 111 of the rotor 101 by any suitable means in the art, such as by adhesion. Although in fig. 2, the buffer structure 115 is shown disposed around the entire inner circumferential surface 111 of the body 103, it should be understood that the buffer structure 115 may also be partially disposed around the inner circumferential surface 111 of the body 103, with the keyway 113 being formed in the buffer structure 115.
By providing such a buffer structure 115, a key for transmitting torque between the rotor 101 and the pump shaft can be received in the key groove 113 formed of a flexible material, which can reduce the impact of the key on the rotor 101 when the torque fluctuates, thereby reducing the risk of damage to the key groove 113 of the rotor 101, the key, the butt key groove of the pump shaft, and even the rotor 101 and the pump shaft, and prolonging the service life of the rotor 101, the key, and the pump shaft.
The rotor of the present application may be used in any type of vane pump. A vane pump refers to a device for pumping various forms of liquid media in various applications. The rotor of the present application may also be used in a vane pump that is incorporated into a high pressure fuel pump.
Fig. 3 shows a high pressure fuel pump 117 using the rotor 101 shown in fig. 2. The high pressure fuel pump 117 may be used to draw fuel from a fuel tank and deliver it under pressure to the common rail system. The high pressure fuel pump 117 may include a vane pump 119 for drawing fuel from the fuel tank into a high pressure plunger pump of the high pressure fuel pump 117. The rotor 101 may be eccentrically disposed in a stator 121 of the vane pump 119. The plurality of vanes 123 are respectively received in the plurality of vane grooves 107 of the rotor 101 and are reciprocally extendable and retractable in the respective vane grooves 107. The pump shaft 125 extends into the shaft bore 109 of the rotor 101. The key 127 is disposed within a keyway 113 formed in the bumper structure 115 of the rotor 101 and partially protrudes from the keyway 113. The portion of the key 127 that protrudes out of the keyway 113 is then received in a mating keyway (not shown) of the pump shaft 125, whereby the rotor 101 is mounted to the pump shaft 125 to be driven by the pump shaft 125. The pump shaft 125 may be made of a metallic material. The key 127 may be made of a metallic material or a non-metallic material. In one example, the pump shaft 125 also serves as a camshaft for a driven cam of a high pressure plunger pump that drives the high pressure fuel pump 117.
As the rotor 101 is driven, the outer end of each vane 123 is in sliding contact with the inner circumferential surface of the stator 121. In this way, each of the working chambers enclosed between the inner peripheral surface of the stator 121, the outer peripheral surface 111 of the rotor 101, and the vanes 123 undergoes a volume change, and the fuel drawn into the stator 121 from the inlet is pressurized by the vanes 123 protruding from the outer peripheral surface 111 of the rotor 101 and then discharged through the outlet. Since the key 127 is received in the key slot 113 formed in the buffer structure 115, it is possible to reduce the impact of the key on the rotor 101 when the torque fluctuates, thereby reducing the risk of damage to the key slot 113 of the rotor 101, the key 127, the butt key slot of the pump shaft 125, and even to the rotor 101 and the pump shaft 125, and thus extending the service life of the rotor 101, the key 127, and the pump shaft 125.
Fig. 4 shows a rotor 201 according to a second embodiment of the present application. The rotor 201 differs from the rotor 101 in that: the rotor 201 has four key slots 213 formed in the buffer structure 215 at regular intervals. This enables the rotor 201 to be coupled with the pump shaft of the vane pump by four keys, thereby dispersing impact on the rotor 201 when torque fluctuates. This further reduces the risk of damage to the rotor 201 keyways 213, keys, pump shaft keyways, and even the rotor 201 and pump shaft, thereby extending the useful life of the rotor 201, keys, and pump shaft.
It should be understood that the rotor damping structure may also provide other numbers of key slots, such as two, three, five or more key slots, to enable the rotor to be connected to the pump shaft of the vane pump by a corresponding number of keys to dissipate the impact on the rotor as torque fluctuates.
Fig. 5 shows a rotor 301 according to a third embodiment of the present application. The rotor 301 is a two-piece rotor. Specifically, the body 303 of the rotor 301 includes an inner ring portion 303a and an outer ring portion 303b fitted around the inner ring portion 303 a. The outer ring portion 303b defines an outer circumferential surface 305 of the rotor 301. A plurality of blade grooves 307 may be formed in the outer ring portion 303b extending radially inward from the outer circumferential surface 305 for receiving blades. A shaft hole 309 may be formed centrally in the inner ring portion 303a for allowing a pump shaft of the vane pump to extend. The rotor 301 may also include at least one keyway 313 (a single keyway is shown in fig. 5). The keyway 313 is for mating with a mating keyway of a pump shaft to receive a corresponding key to mount the rotor 301 to the pump shaft of a vane pump and to transmit torque between the rotor 301 and the pump shaft. Shaft bore 309 also defines an inner circumferential surface 311 of body 303.
To reduce the risk that the rotor, keys and pump shaft are easily damaged in the event of torque fluctuations, the rotor 301 may further include a buffer structure 315 disposed in the body 303 for reducing shock. Specifically, as shown in fig. 3, the buffer structure 315 is provided between the inner ring portion 303a and the outer ring portion 303b, and connects the inner ring portion 303a and the outer ring portion 303b together so as to be rotatable together. The buffer structure 315 may be made of a flexible material. As described above, in the present application, the flexible material refers to a material capable of absorbing impact while transmitting torque. The flexible material is preferably a non-metallic flexible material, more preferably a rubber material. The cushion structure 315 may connect the inner ring portion 303a and the outer ring portion 303b together (e.g., by bonding) by any suitable means known in the art, such as by gluing. When the torque transmitted from the pump shaft to the rotor 301 through the key fluctuates, the key causes an impact on the rotor 301. In this case, the bumper structure 315 allows the inner ring portion 303a to twist at an angle relative to the outer ring portion 303b to reduce or even eliminate such impact. This can reduce the risk of damage to the keyways 313 of the rotor 301, the keys, the mating keyways of the pump shaft, and even to the rotor 301 and the pump shaft, thereby extending the useful life of the rotor 301, the keys, and the pump shaft.
It should be understood that although in the embodiment shown in fig. 5, the key groove 313 is shown as being formed in the inner ring portion 303a extending outwardly from the inner peripheral surface 311, the key groove 313 may also be formed in another buffer structure similar to the buffer structure 115 of the embodiment shown in fig. 2.
It should also be understood that the body 303 of the rotor 301 may further include at least one intermediate portion that is nested between the inner ring portion 303a and the outer ring portion 303b, and the cushioning structure 315 may be disposed between the inner ring portion 303a, the at least one intermediate portion, and the outer ring portion 303b, respectively, and connect the inner ring portion 303a, the at least one intermediate portion, and the outer ring portion 303b together (e.g., by bonding) so that they are able to rotate together.
Fig. 6 shows a rotor 401 according to a fourth embodiment of the present application. Rotor 401 differs from rotor 101 in that: the cushioning structure 415 of the rotor 401 is not made of a flexible material, but is formed by removing a portion of the body 403 of the rotor 401. In one particular example, as shown in fig. 6, the cushioning structure 415 is formed by at least one hole 429 (four holes in fig. 6) extending through the body 403 from the first end face to the second end face in the body 403. By providing such a buffer structure 415, the rotational inertia of rotor 401 can be reduced by reducing the mass of rotor 401, thereby enabling rotor 401 to better conform to fluctuations in torque when fluctuations occur, so as to reduce the impact of the key on rotor 401. This can reduce the risk of damage to the keyways 413 of the rotor 401, the keys, the mating keyways of the pump shaft, and even to the rotor 401 and the pump shaft, thereby extending the useful life of the rotor 401, the keys, and the pump shaft.
In addition, although in the embodiment shown in fig. 6, the key groove 413 is shown to be formed in the body 403 extending outward from the inner peripheral surface 411, the key groove 413 may be formed in another buffer structure similar to the buffer structure 115 of the embodiment shown in fig. 2. It should be appreciated that the buffer structure 415 may also be formed by removing a portion of the body 403 of the rotor 401 in other suitable manners.
In addition, similar to the rotor 101, the rotors 201, 301, and 401 may be used with any type of vane pump, including vane pumps that are incorporated into high pressure fuel pumps.
Although the rotor shown in the figures is provided with four vane slots, other numbers of vane slots are possible. In addition, in the rotor shown in the figures, the vane grooves are provided along the radial direction of the rotor, but the vane grooves may also be inclined forward or backward at an angle in the rotor rotation direction with respect to the radial direction of the rotor.
The present invention has been described in detail with reference to the specific embodiments. It is clear that the embodiments described above and shown in the drawings are to be understood as illustrative and not as restrictive. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit of the invention, and these changes and modifications do not depart from the scope of the invention.
Claims (10)
1. A rotor for a vane pump comprising:
a body having a first end face, a second end face opposite the first end face, and a peripheral face (105, 305) extending between the first and second end faces;
a plurality of vane slots (107, 307) formed in the body extending inwardly from the outer peripheral surface (105, 305) for receiving vanes;
a shaft hole (109, 309) formed centrally in the body for allowing a pump shaft of the vane pump to extend into;
characterized in that the rotor further comprises:
at least one keyway for receiving a key, wherein the key is for connecting the rotor to the pump shaft to transmit torque between the rotor and the pump shaft; and
a buffer structure disposed in the body for reducing impact of the key on the rotor.
2. The rotor of claim 1, wherein the buffer structure is made of a flexible material.
3. The rotor of claim 2, wherein the shaft bore (109, 309) defines an inner circumferential surface of the body, the buffer structure is at least partially disposed about the inner circumferential surface and is configured to receive the pump shaft, and the at least one key groove is formed in the buffer structure.
4. A rotor according to claim 2, characterised in that the rotor is a multi-piece rotor and the body comprises at least an inner ring portion (303a) and an outer ring portion (303b) which is sleeved outside the inner ring portion (303a), the damping structure being provided between the outer ring portion (303b) and the inner ring portion (303a) and connecting the outer ring portion (303b) and the inner ring portion (303a) together so that they can rotate together.
5. A rotor according to any of claims 2 to 4, wherein the flexible material is a rubber material.
6. The rotor of claim 1, wherein the buffer structure is formed by removing a portion of the body.
7. The rotor as recited in claim 6, characterized in that the buffer structure is formed by at least one hole (429) in the body extending through the body from the first end face to the second end face.
8. A vane pump (119), characterized in that the vane pump (119) comprises:
a stator (121);
the rotor according to any of claims 1 to 7, being eccentrically arranged in the stator (121); and
a plurality of vanes (123) received in the plurality of vane slots (107, 307) of the rotor;
a pump shaft (125) extending into the shaft bore of the rotor;
the at least one keyway of the rotor mates with a mating keyway of the pump shaft (125) to receive a key (127) to mount the rotor to the pump shaft (125) and enable the rotor to rotate with the pump shaft (125) relative to the stator (121).
9. A high pressure fuel pump (117), characterized in that the high pressure fuel pump (117) comprises:
-a vane pump (119) according to claim 8; and
at least one plunger pump in fluid communication with the vane pump (119).
10. The high pressure fuel pump (117) of claim 9, wherein the vane pump (119) and the at least one plunger pump share a common pump shaft (125).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021182257.0U CN212717148U (en) | 2020-06-23 | 2020-06-23 | Rotor for vane pump, vane pump and high-pressure fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021182257.0U CN212717148U (en) | 2020-06-23 | 2020-06-23 | Rotor for vane pump, vane pump and high-pressure fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212717148U true CN212717148U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021182257.0U Active CN212717148U (en) | 2020-06-23 | 2020-06-23 | Rotor for vane pump, vane pump and high-pressure fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212717148U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685467A (en) * | 2021-08-23 | 2021-11-23 | 珠海格力电器股份有限公司 | Wheel hub, wheel hub subassembly, stopper and motor |
-
2020
- 2020-06-23 CN CN202021182257.0U patent/CN212717148U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685467A (en) * | 2021-08-23 | 2021-11-23 | 珠海格力电器股份有限公司 | Wheel hub, wheel hub subassembly, stopper and motor |
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