Forward and reverse rotation internal gear pump core assembly with noise reduction function

Abstract

The utility model discloses a forward and reverse rotation internal gear pump core assembly with a noise reduction function, which comprises a gear contact surface, a driving gear arranged in a driven gear and meshed with the driven gear, a crescent plate arranged between the driving gear and the driven gear, side plates arranged on both sides of the driven gear, first channels arranged on both sides of the side plates, and second channels arranged on both sides of the crescent plate. The side plate is fixedly provided with a gear contact surface, the gear contact surface is arranged between the side plate and the driven gear, the gear contact surface is provided with a second channel matched with the first channel, the second channel is provided with a noise reduction groove, one end of the limiting pin is arranged on the crescent plate, and the other end of the limiting pin penetrates through the side plate and extends to the outer side of the side plate; and a liquid accumulation groove matched with the limiting pin is formed in the gear contact surface. The gear contact face is arranged between the driven gear and the side plate, the second channel is formed in the gear contact face, the noise reduction groove is formed in the second channel, and noise generated when the gear pump works can be effectively eliminated under the action of the noise reduction groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear pump technical field, especially positive and negative operation internal meshing gear pump core assembly with noise reduction function. BACKGROUND

[0002] In the prior art, the internal meshing gear pump produces noise when working. In some working environments, it is required to be silent or the sound needs to be controlled to be very small, so a kind of internal meshing gear pump with little noise is required. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the insufficient of prior art, provide positive and negative operation internal meshing gear pump core assembly with noise reduction function.

[0004] The utility model aims at overcoming the insufficient of prior art, provide positive and negative operation internal meshing gear pump core assembly with noise reduction function.

[0005] Positive and negative operation internal meshing gear pump core assembly with noise reduction function, including driving gear, driven gear, crescent plate, side plate, limit pin and gear contact surface, the driving gear is arranged in the driven gear and is engaged with the driven gear, the crescent plate is arranged between the driving gear and the driven gear, the both sides of the driven gear are provided with the side plate that is matched with the driven gear, the both sides of the side plate are provided with the first passageway that is communicated with the inside of the driven gear, the gear contact surface is fixedly arranged on the side plate, and the gear contact surface is arranged between the side plate and the driven gear, the second passageway that is matched with the first passageway is arranged on the gear contact surface, the second passageway is provided with the noise reduction groove, one end of the limit pin is arranged on the crescent plate, the other end of the limit pin passes through the side plate and extends to the outside of the side plate, and the gear contact surface is provided with the liquid accumulation groove that is matched with the limit pin.

[0006] Further, the crescent plate is provided with compensation groove, the both sides of the compensation groove are provided with compensation plate that is matched with the driven gear, and the two compensation plates are symmetrically arranged.

[0007] Further, the bottom of the compensation groove is provided with mounting groove, the mounting groove is provided with elastic plate, and the compensation column is arranged between the elastic plate and the compensation plate.

[0008] Further, the both sides of the compensation groove are provided with flow guide inclined surface.

[0009] Further, the gear contact surface is provided with flow guide groove, and the flow guide groove is arranged between the compensation plate and the crescent plate.

[0010] Further, the diameter of the side plate is larger than the diameter of the gear contact surface, and the side plate is coaxially arranged with the gear contact surface.

[0011] Further, a trapezoidal end head is arranged on the end of the limiting pin, and a wedge-shaped groove matched with the trapezoidal end head is arranged on the middle of the two sides of the crescent plate.

[0012] Further, a reinforcing rib is arranged on the first channel.

[0013] Further, a sealing ring matched with the first channel is arranged on the side plate.

[0014] The beneficial effects of the utility model are:

[0015] 1) In the technology, the gear contact surface is arranged between the driven gear and the side plate, the second channel is arranged on the gear contact surface, and the noise reduction groove is arranged on the second channel, so that the noise generated by the gear pump during work can be effectively eliminated.

[0016] 2) In the technology, the elastic plate is matched with the compensation column, so that the liquid in the high-pressure area can be effectively prevented from leaking between the driving gear and the crescent plate and between the driven gear and the compensation plate.

[0017] 3) In the technology, the reinforcing rib is arranged on the first channel, so that the deformation and damage of the first channel can be effectively prevented. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an explosion view of the inner meshing gear pump core assembly;

[0019] Figure 2 It is a cooperation structure view between the driving gear, the driven gear and the crescent plate;

[0020] Figure 3 It is a cooperation structure view between the crescent plate and the compensation plate;

[0021] Figure 4 It is a structure view of the reinforcing rib arranged on the side plate;

[0022] Figure 5 It is a structure view of the side plate without the reinforcing rib;

[0023] In the drawing, 1 is a driving gear, 2 is a driven gear, 3 is a crescent plate, 4 is a side plate, 5 is a limiting pin, 6 is a gear contact surface, 7 is a first channel, 8 is a second channel, 9 is a noise reduction groove, 10 is an accumulated liquid groove, 11 is a compensation groove, 12 is a compensation plate, 13 is a mounting groove, 14 is a compensation column, 15 is an elastic plate, 16 is a flow guide inclined surface, 17 is a flow guide groove, 18 is a trapezoidal end head, 19 is a wedge-shaped groove, 20 is a reinforcing rib, 21 is a sealing ring, 22 is a liquid guide groove, and 23 is a U-shaped groove. DETAILED DESCRIPTION

[0024] The technical solutions of the utility model will be described clearly and completely in combination with the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] With reference to Figures 1-5 The utility model provides a technical scheme:

[0026] The application discloses a positive and reverse rotation inner meshing gear pump core assembly with a noise reduction function, which comprises a driving gear, a driven gear, a crescent plate, side plates, a limiting pin and a gear contact surface, wherein the driving gear is arranged in the driven gear and is in mesh with the driven gear; the crescent plate is arranged between the driving gear and the driven gear; the driven gear is provided with the side plates on both sides and in cooperation with the driven gear; the side plates are provided with first channels in communication with the inside of the driven gear on both sides; the gear contact surface is fixedly arranged on the side plate and is arranged between the side plate and the driven gear; the gear contact surface is provided with second channels in cooperation with the first channels; the second channels are provided with noise reduction grooves; one end of the limiting pin is arranged on the crescent plate; the other end of the limiting pin penetrates through the side plate and extends to the outside of the side plate; the gear contact surface is provided with liquid accumulation grooves in cooperation with the limiting pin. The first channels are provided with reinforcing ribs. The driving gear, the driven gear, the crescent plate, the side plates, the limiting pin and the gear contact surface are arranged in the pump cavity in the pump body, and the pump body is sealed by a pump cover; the driven gear is arranged in the pump cavity and is in cooperation with the pump cavity; a driving shaft is connected with the driving gear after penetrating through the pump body; the driving shaft drives the driving gear to rotate; the driving gear is in mesh with the driven gear and drives the driven gear to rotate in the pump cavity. The side plates are arranged on both sides of the driven gear and are used for preventing the driving gear and the driven gear from causing abrasion to the bottom of the pump cavity and the pump cover during rotation; the cross section of the side plate is circular and is coaxially arranged with the driven gear. The driving gear and the driven gear form a pressure cavity, the crescent plate is used for dividing the pressure cavity into a high-pressure cavity and a low-pressure cavity, the side plate is provided with two first channels, one first channel is in communication with the high-pressure cavity, the other first channel is in communication with the low-pressure cavity, the pumping medium enters the low-pressure cavity through the first channel in cooperation with the low-pressure cavity, and is discharged from the first channel in cooperation with the high-pressure cavity after being pressurized by the rotation of the driving gear and the driven gear. The gear contact surface is arranged between the driven gear and the side plate, two second channels in cooperation with the first channels are arranged on the gear contact surface, and noise reduction grooves are arranged on the second channels; the noise reduction grooves are arranged close to the crescent plate side; under the action of the noise reduction grooves, the pressure mutation in the high-pressure cavity or the low-pressure cavity is prevented to cause vibration and noise. During the cooperation of the driving gear and the driven gear, the crescent plate is easy to move, therefore, two limiting pins are arranged, one end of the two limiting pins is inserted into the middle part of the crescent plate, the other end of one limiting pin is inserted into the pump body through one side plate, and the other end of the other limiting pin is inserted into the pump cover through the other side plate. The reinforcing ribs in the first channels are arranged to prevent the deformation of the first channels caused by excessive pressure in the first channels.The two first channels 7 on the same side plate 4 are symmetrically arranged, the two second channels 8 are symmetrically arranged, the noise reduction grooves 9 on the second channels 8 are symmetrically arranged, and the flow guide grooves 17 on the second channels 8 are symmetrically arranged. Figure 2 As shown, during clockwise operation, the left side of the crescent plate 3 is a high-pressure cavity, and the pressure will leak through the end face gap between the driven gear 2 and the side plate 4, the gap between the driving gear 1 and the crescent plate 3, and the gap between the driven gear 2 and the compensation plate 12. The accumulated liquid groove 10 can collect the leaked oil. The liquid guide groove 22 formed between the side plate 4 and the gear contact surface 6 is an annular groove, which can also collect the leaked oil. The leaked oil collected in the annular groove enters the motor through the accumulated liquid groove 10 and the U-shaped groove 23 on the side plate 4, which can cool the motor. The side plate 4 is provided with a through hole matched with the motor output shaft, and the U-shaped groove 23 is arranged on the through hole. The motor output shaft passes through the through hole and is connected with the driving gear 1.

[0027] In some embodiments, the crescent plate 3 is provided with a compensation groove 11, and compensation plates 12 matched with the driven gear 2 are arranged on both sides of the compensation groove 11. The two compensation plates 12 are symmetrically arranged. The bottom of the compensation groove 11 is provided with a mounting groove 13, the mounting groove 13 is provided with an elastic plate 15, and the compensation plate 12 is provided with a compensation column 14 between the compensation plate 12 and the elastic plate 15. The two sides of the compensation groove 11 are provided with flow guide inclined surfaces 16. The flow guide inclined surfaces 16 are arranged to facilitate the delivery of the medium, so that the compensation can be faster. The compensation groove 11 is used to install the compensation plate 12, and the two sides of the crescent plate 3 are flush with the two sides of the compensation plate 12. The two ends of the compensation column 14 and the elastic plate 15 are flush with the two sides of the crescent plate 3. The two mounting grooves 13 on the crescent plate 3 are symmetrically arranged. The elastic plate 15 is an elastic element, and the arc structure of the elastic plate 15 can provide elastic force to ensure that the compensation plate 12 and the crescent plate 3 can be separated at the beginning. The compensation column 14 is a sealing rod, which provides a sealing effect under high pressure to seal the high-pressure oil flowing from the high-pressure cavity to the compensation plate 12 and the crescent plate 3.

[0028] In some embodiments, the gear contact surface 6 is provided with a flow guide groove 17 arranged between the compensation plate 12 and the crescent plate 3. Since the driving gear 1 and the driven gear 2 work in meshing, each meshing will produce a pulse. The flow guide groove 17 can introduce high pressure in advance to avoid pressure mutation and high pulse.

[0029] In some embodiments, the diameter of the side plate 4 is greater than the diameter of the gear contact surface 6, and the side plate 4 and the gear contact surface 6 are coaxially arranged. The diameter of the gear contact surface 6 is smaller than the diameter of the side plate 4, so that the liquid guide groove 22 is formed between the side plate 4 and the gear contact surface 6. The delivery medium in the pump cavity can enter the low-pressure cavity through the liquid guide groove.

[0030] In some embodiments, a trapezoidal end head 18 is arranged on the end of the limit pin 5, and a wedge-shaped groove 19 matched with the trapezoidal end head 18 is arranged on the middle of the two sides of the crescent plate 3. In the working process, the crescent plate 3 has a small range of movement and rotation, and cannot be completely fixed, so the trapezoidal end head 18 matched with the wedge-shaped groove 19 is the best choice.

[0031] In some embodiments, a sealing ring 21 matched with the first channel 7 is arranged on the side plate 4. The sealing ring 21 prevents the leakage of the conveying medium, one sealing ring 21 is arranged between the side plate 4 and the bottom of the pump cavity, and the other sealing ring 21 is arranged between the side plate 4 and the pump cover. The sealing ring 21 is a sealing element, and the driven gear 2 and the side plate 4 and other components are pressed together through the elasticity of the sealing ring 21. Two sealing rings 21 are arranged on each side plate 4, and the two sealing rings 21 are matched with two first channels 7 respectively. Two sealing rings 21 are arranged on the low-pressure cavity side, and two sealing rings 21 are arranged on the high-pressure cavity side. The sealing ring 21 side of the high-pressure cavity and the driven gear 2 side of the high-pressure cavity both act on the side plate 4, and the elasticity of the sealing ring 21 is added, so that the forces on the two sides of the side plate 4 have an optimal ratio, the side plate 4 is attached to the driven gear 2, and the balance between wear and leakage is ensured.

[0032] In the description of the utility model, it is understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "the other end", "coaxial", "one side", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In the utility model, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "fixation", "hinge" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the specific meaning of the above terms in the utility model can be understood according to the specific situation by those skilled in the art.

[0034] The above merely describes preferred embodiments of the present application, and it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein, by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. A forward and reverse rotating internal gear pump core assembly with noise reduction function, characterized in that: The utility model provides a gear contact surface (6) is provided with the second channel (8) on the gear contact surface (6) is provided with the second channel (8) with first channel (7) cooperation, the second channel (8) is provided with the noise reduction groove (9) on the second channel (8), the limit pin (5) one end is provided on the crescent plate (3), the limit pin (5) other end passes through the side plate (4) and extends to the outside of side plate (4), the gear contact surface (6) is provided with the effusion groove (10) with limit pin (5) cooperation on the gear contact surface (6).

2. The positive and negative rotation intermeshing gear pump core assembly with noise reduction function according to claim 1, characterized in that: The crescent plate (3) is provided with a compensation groove (11), and the compensation groove (11) is provided with a compensation plate (12) on both sides of the compensation groove (11) and cooperates with the driven gear (2).

3. The positive and negative rotation internal gear pump core assembly with noise reduction function according to claim 2, characterized in that: The bottom of the compensation groove (11) is provided with a mounting groove (13), and the mounting groove (13) is provided with an elastic plate (15) therein, and the compensation column (14) is arranged between the elastic plate (15) and the compensation plate (12).

4. The positive and negative rotation internal gear pump core assembly with noise reduction function according to claim 2 or 3, characterized in that: The compensation groove (11) is provided with a flow guide inclined surface (16) on both sides.

5. The positive and negative rotation internal gear pump core assembly with noise reduction function according to any one of claims 1-3, characterized in that: The gear contact surface (6) is provided with a flow guide groove (17), and the flow guide groove (17) is arranged between the compensation plate (12) and the crescent plate (3).

6. The positive and negative rotation internal gear pump core assembly with noise reduction function according to any one of claims 1-3, characterized in that: The diameter of the side plate (4) is greater than the diameter of the gear contact surface (6), and the side plate (4) and the gear contact surface (6) are coaxially arranged.

7. The positive and negative rotation internal gear pump core assembly with noise reduction function according to any one of claims 1-3, characterized in that: The end of the limit pin (5) is provided with a trapezoidal end (18), and the middle of both sides of the crescent plate (3) is provided with a wedge-shaped groove (19) cooperating with the trapezoidal end (18).

8. The positive and negative rotation internal gear pump core assembly with noise reduction function according to any one of claims 1-3, characterized in that: The first channel (7) is provided with a reinforcing rib (20).

9. The positive and negative rotation internal gear pump core assembly with noise reduction function according to any one of claims 1-3, characterized in that: The side plate (4) is provided with a sealing ring (21) cooperating with the first channel (7).

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