Integrated motor water pump

Abstract

The utility model discloses an integrated motor water pump which comprises an internal gear pump, a frameless motor and a shaft. The internal gear pump comprises a first end cover, an outer gear ring, an inner gear ring and a shell, the outer gear ring is located on the outer side of the inner gear ring, the outer gear ring and the inner gear ring are installed at one end of an inner cavity of the shell, and the first end cover is installed at the end of the shell and is close to the outer gear ring and the inner gear ring. The frameless motor comprises a rotor and a stator, the rotor sleeves the inner side of the stator, and the rotor and the stator are mounted at the other end of the inner cavity of the shell; the shaft penetrates through a shaft mounting cavity of the internal gear pump and a shaft mounting cavity of the frameless motor and is connected with the rotor and the inner gear ring, and the shaft is a hollow shaft; a limiting rubber ring is installed between the end of the shaft and the first end cover, and axial limiting of the shaft is achieved through the limiting rubber ring. A sliding bearing is installed in a shaft installation cavity of the internal gear pump, and radial limiting of a shaft is achieved through the sliding bearing. According to the integrated motor water pump, the water pump and the motor are integrated, so that space occupation of the water pump and the motor module is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water pump especially one -piece motor water pump. BACKGROUND

[0002] Water is the source of life and the basis of all things. To solve the problem of lack of fresh water resources, humans have developed various types of seawater desalination devices, among which centrifugal pumps and piston pumps reverse osmosis seawater desalination are the main solutions. Although the development of seawater desalination technology has solved the problem of lack of fresh water resources to some extent, the distribution of fresh water resources still limits the range of human activities to some extent, such as personal outdoor activities. Therefore, seawater desalination devices need to be miniaturized for easy carrying. In addition, with the rapid development of artificial intelligence and human-computer interaction technology, robots have a wide range of applications in many industries, among which hydraulic drive units are widely used in robot power systems due to their high load, high power density and high reliability. Because different actions of robots require different pump output flow and system pressure, a motor-driven hydraulic pump is used to control the output flow and system pressure of the hydraulic pump by adjusting the motor speed. With the continuous development of the robot field, the structure of the robot is gradually designed to be small, light and low noise, so the space of the power unit system structure is also required to be higher.

[0003] In the water hydraulic industry, the water pump and the motor are the two core components of the water hydraulic system power module. As separate parts, the water pump and the motor occupy a large space in the hydraulic system group. Traditionally, the motor and the hydraulic pump are produced by different manufacturers, so they are discrete units, and the common connection method is to connect and transmit torque through a shaft coupling. That is, the common connection method of the motor and the pump is to realize the driving function only through the shaft coupling, and the structure is only axially arranged, so the power unit occupies a large space volume. In addition, due to the separate connection, the centering degree of the motor shaft and the hydraulic pump shaft is relatively poor, and vibration and noise are easily generated during variable speed driving. In addition, due to the existence of the motor independent cooling fan, the noise will be further intensified. SUMMARY

[0004] The utility model aims at least to solve one of the technical problems existing in the prior art.

[0005] Therefore, the utility model provides an integrated motor water pump, which integrates the water pump and the motor to reduce the space occupation of the water pump and the motor module.

[0006] According to the utility model embodiment, the integrated motor water pump comprises an internal meshing gear pump, a frameless motor and a shaft, the internal meshing gear pump comprises a first end cover, an outer gear ring, an inner gear ring and a shell, the outer gear ring is located at the outer side of the inner gear ring, the outer gear ring and the inner gear ring are installed at one end of the inner cavity of the shell, the first end cover is installed at the end of the shell and is close to the outer gear ring and the inner gear ring, the frameless motor comprises a rotor and a stator, the rotor is sleeved at the inner side of the stator, the rotor and the stator are installed at the other end of the inner cavity of the shell, the shaft penetrates the shaft installation cavity of the internal meshing gear pump and the shaft installation cavity of the frameless motor and is connected with the rotor and the inner gear ring, the shaft is a hollow shaft, a limiting rubber ring is installed between the end of the shaft and the first end cover, the axial position of the shaft is limited through the limiting rubber ring, a sliding bearing is installed in the shaft installation cavity of the internal meshing gear pump, the radial position of the shaft is limited through the sliding bearing, the gap formed by the matching surface between the shell, the first end cover, the outer gear ring and the inner gear ring is a drainage cavity, the pump inlet cavity and the pump outlet cavity are formed in the shell, the backflow hole is formed in the shaft, the gap formed between the sliding bearing and the shaft is a lubricating through-flow cavity, the fluid medium flows from the pump inlet cavity, a part of the fluid medium directly flows out from the pump outlet cavity, a part of the fluid medium starts from the pump outlet cavity, flows from the pump outlet cavity to the drainage cavity, and then flows back to the pump inlet cavity through the drainage cavity, a part of the fluid medium starts from the pump outlet cavity, flows from the pump outlet cavity to the lubricating through-flow cavity and the backflow hole, then flows into the shaft cavity of the shaft, exchanges heat with the fluid in the shaft cavity, and then flows back to the pump inlet cavity through the drainage cavity.

[0007] The utility model discloses a beneficial effect is, water pump and motor are integrated to reduce water pump and motor module space occupation, compact structure, the space volume is less, share transmission shaft, no shaft eccentric problem, no coupling and independent cooling fan, low noise, motor through liquid cooling, need not extra cooling system.

[0008] According to the utility model embodiment, the shell is integrated structure, and the shell is cylindrical.

[0009] According to the utility model embodiment, the shaft installation cavity of the internal meshing gear pump and the shaft installation cavity of the frameless motor are not communicated.

[0010] According to the utility model embodiment, the shaft installation cavity of the internal meshing gear pump is provided with a sealing groove, and a stefen is installed in the sealing groove to realize fluid sealing.

[0011] According to the utility model embodiment, a first sealing ring is arranged between the first end cover and the shell to realize sealing between the first end cover and the shell.

[0012] According to one embodiment of the present application, the shaft is connected with the inner gear ring through a flat key.

[0013] According to one embodiment of the present application, the sliding bearing is located between the Stiftung and the flat key.

[0014] According to one embodiment of the present application, one end of the shaft close to the rotor and the stator is sealed and installed with a second end cover through a second sealing ring.

[0015] Other features and advantages of the present application will be described in the following description, and some of them will become apparent from the description, or will be understood from the practice of the present application. The purpose and other advantages of the present application are achieved by the structure specifically pointed out in the specification and the drawings.

[0016] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 is a structural schematic diagram of the present application.

[0019] The reference numerals in the figure are: 1, first end cover; 2, outer gear ring; 3, inner gear ring; 4, flat key; 5, shaft; 6, limit rubber ring; 7, first sealing ring; 8, sliding bearing; 9, Stiftung; 10, rotor; 11, stator; 12, shell; 13, second sealing ring; 14, second end cover; a, drainage cavity; b, pump inlet cavity; c, pump outlet cavity; d, backflow hole; e, lubrication through-flow cavity. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] In the description of the utility model, it needs to be understood that the terms "one side", "the other side", "two sides", "between", "middle", "upper end", "lower end" and the like indicate the orientation or positional relationship based on 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 thus cannot be understood as limiting the utility model.

[0022] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0023] The integrated motor water pump of the utility model embodiment is specifically described below with reference to the drawings.

[0024] See Figure 1 The integrated motor water pump of the utility model, including internal meshing gear pump, frameless motor and shaft 5;The internal meshing gear pump includes first end cover 1, outer gear ring 2, inner gear ring 3 and shell 12, outer gear ring 2 is located at the outer side of inner gear ring 3, outer gear ring 2 and inner gear ring 3 are installed in the one end of the inner cavity of shell 12, first end cover 1 is installed in the end of shell 12 and is close to outer gear ring 2 and inner gear ring 3;Frameless motor includes rotor 10 and stator 11, rotor 10 is sleeved on the inner side of stator 11, rotor 10 and stator 11 are installed in the other end of the inner cavity of shell 12;Shaft 5 penetrates the shaft mounting cavity of internal meshing gear pump and the shaft mounting cavity of frameless motor and is connected with rotor 10, inner gear ring 3, and the end of shaft 5 and first end cover 1 are installed with limit rubber ring 6, the axial position of shaft 5 is realized through limit rubber ring 6;Sliding bearing 8 is installed in the shaft mounting cavity of internal meshing gear pump, and the radial position of shaft 5 is realized through sliding bearing 8;The gap formed by the matching surface between shell 12, first end cover 1, outer gear ring 2 and inner gear ring 3 is drainage cavity a, pump inlet cavity b and pump outlet cavity c are set up on shell 12, backflow hole d is set up on shaft 5, and the gap formed between sliding bearing 8 and shaft 5 is lubrication through-flow cavity e. Fluid medium flows from pump inlet cavity b, and part of fluid medium directly flows from pump outlet cavity c;Part of fluid medium starts from pump outlet cavity c, flows from pump outlet cavity c to drainage cavity a, and then flows back to pump inlet cavity b through drainage cavity a;Part of fluid medium starts from pump outlet cavity c, flows from pump outlet cavity c to lubrication through-flow cavity e and backflow hole d, and then flows into the shaft cavity of shaft 5, exchanges heat with the fluid in the shaft cavity, and then flows back to pump inlet cavity b through drainage cavity a.

[0025] The shell 12 is an integrated structure, and the shell 12 is in a cylindrical shape. The shaft installation cavities of the internal gear pump and the shaft installation cavity of the frameless motor are not communicated with each other. The shaft installation cavity of the internal gear pump is provided with a sealing groove, and a Stieber seal 9 is installed in the sealing groove to realize fluid sealing. The first end cover 1 and the shell 12 are provided with a first sealing ring 7 to realize sealing between the first end cover 1 and the shell 12. The shaft 5 is connected with the inner gear ring 3 through a flat key 4. The sliding bearing 8 is located between the Stieber seal 9 and the flat key 4. The second end cover 14 is sealed and installed on one end of the shaft 5 close to the rotor 10 and the stator 11 through a second sealing ring 13.

[0026] The integrated motor water pump is designed by integrating the frameless motor and the internal gear pump, and adopts an integrated shell 12. The shaft 5 transversely penetrates the two cavities and is connected with the rotor 10 of the frameless motor and the inner gear ring 3 of the internal gear pump. The shaft hole is sealed by the Stieber seal 9 to realize fluid sealing. Meanwhile, the shaft 5 is provided with a rubber ring at one end to prevent the shaft 5 from moving greatly. The sliding bearing 8 bears the radial position limitation of the shaft 5. Since the frameless motor does work to the outside, heat generation is inevitable. In consideration of the heat dissipation problem of the frameless motor, the shaft 5 is designed as a hollow shaft. Meanwhile, the middle part of the shaft 5 is provided with a backflow hole d. One end of the shaft 5 is sealed by the second end cover 14. The other end of the shaft 5 is kept open and is communicated with the pump inlet cavity b through the drainage cavity a. During the operation of the pump, since there is a gap between the inner gear ring 3, the outer gear ring 2 and the mating surfaces of the first end cover 1 and the shell 12, the fluid medium flows into the shaft cavity through the gap, the lubrication through-flow cavity e and the backflow hole d, exchanges heat with the fluid in the shaft cavity and then flows into the pump outlet cavity c through the drainage cavity a to take away the heat, so that the heat dissipation problem of the motor is solved.

[0027] The integrated motor water pump integrates the water pump and the motor to reduce the space occupation of the water pump and the motor module, is compact in structure, occupies a small space volume, shares the transmission shaft, has no shaft eccentricity problem, has no shaft coupling and independent heat dissipation fan, is low in noise and needs no additional heat dissipation system.

[0028] The above is only a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An integrated motor water pump characterized by: It comprises an internal gear pump, a frameless motor and a shaft (5); The internal gear pump comprises a first end cover (1), an outer gear ring (2), an inner gear ring (3) and a shell (12), the outer gear ring (2) is located outside the inner gear ring (3), the outer gear ring (2) and the inner gear ring (3) are installed at one end of the inner cavity of the shell (12), and the first end cover (1) is installed at the end of the shell (12) and close to the outer gear ring (2) and the inner gear ring (3). The frameless motor comprises a rotor (10) and a stator (11), the rotor (10) is sleeved on the inner side of the stator (11), and the rotor (10) and the stator (11) are installed at the other end of the inner cavity of the shell (12). The shaft (5) penetrates the shaft mounting cavity of the internal gear pump and the shaft mounting cavity of the frameless motor and is connected with the rotor (10) and the inner gear ring (3), and the shaft (5) is a hollow shaft. A limiting rubber ring (6) is installed between the end of the shaft (5) and the first end cover (1), and the axial position of the shaft (5) is limited by the limiting rubber ring (6). A sliding bearing (8) is installed in the shaft mounting cavity of the internal gear pump, and the radial position of the shaft (5) is limited by the sliding bearing (8). The gap formed by the matching surfaces between the shell (12), the first end cover (1), the outer gear ring (2) and the inner gear ring (3) is a drainage cavity (a), the shell (12) is provided with a pump inlet cavity (b) and a pump outlet cavity (c), the shaft (5) is provided with a backflow hole (d), and the gap formed between the sliding bearing (8) and the shaft (5) is a lubricating through-flow cavity (e). Fluid medium flows from the pump inlet cavity (b), a part of the fluid medium directly flows out from the pump outlet cavity (c), a part of the fluid medium flows from the pump outlet cavity (c) to the drainage cavity (a) through the pump outlet cavity (c), and then flows back to the pump inlet cavity (b) through the drainage cavity (a), and a part of the fluid medium flows from the pump outlet cavity (c) to the lubricating through-flow cavity (e) and the backflow hole (d) through the pump outlet cavity (c), then flows into the shaft cavity of the shaft (5), exchanges heat with the fluid in the shaft cavity, and then flows back to the pump inlet cavity (b) through the drainage cavity (a).

2. The integrated motor water pump of claim 1, wherein: The shell (12) is of an integrated structure and is in a cylindrical shape.

3. The integrated motor water pump of claim 1, wherein: The shaft mounting cavity of the internal gear pump and the shaft mounting cavity of the frameless motor are not communicated with each other.

4. The integrated motor water pump of claim 1, wherein: A sealing groove is formed in the shaft mounting cavity of the internal gear pump, and a statoric seal (9) is installed in the sealing groove to realize fluid sealing.

5. The integrated motor water pump of claim 1, wherein: A first sealing ring (7) is arranged between the first end cover (1) and the shell (12) to realize sealing between the first end cover (1) and the shell (12).

6. The integrated motor water pump of claim 4, wherein: The shaft (5) is connected with the inner gear ring (3) through a flat key (4).

7. The integrated motor water pump of claim 1, wherein: The sliding bearing (8) is located between the statoric seal (9) and the flat key (4).

8. The integrated motor water pump of claim 1, wherein: The shaft (5) is sealed at one end near the rotor (10) and stator (11) by a second sealing ring (13) and fitted with a second end cover (14).

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