Gear pump

Abstract

The utility model discloses a gear pump. The gear pump comprises a shell, an end cover assembly and a power device, a liquid inlet and a liquid outlet are defined in the machine shell, the liquid inlet and the liquid outlet are communicated with the interior of the machine shell, the machine shell is provided with a sealing end, and the sealing end is provided with a first connecting part and a limiting part; the end cover assembly comprises a locking piece and an end cover, the locking piece is provided with a second connecting part, the first connecting part and the second connecting part are detachably connected, and the end cover is located between the locking piece and the limiting part and is in sealed connection with the sealing end; the power device is installed in the machine shell and used for outputting a medium entering the machine shell through the liquid inlet from the liquid outlet. The end cover of the gear pump disclosed by the utility model can be conveniently disassembled.

Description

Technical Field

[0001] This utility model relates to the field of liquid pump technology, and in particular to a gear pump. Background Technology

[0002] Gear pumps, as a common type of positive displacement pump, have advantages such as simple structure and high pressure resistance. They offer more stable and efficient performance in low flow and high head ranges, making them more suitable as a power source for media circulation in applications such as data centers and energy storage battery cooling. Because gear pump systems have very strict sealing requirements, their casings are always fully enclosed.

[0003] Specifically, the end cover of the gear pump is sealed to the axial sealing end of the gear pump housing by welding. This satisfies the sealing requirements of the gear pump and prevents leakage of the internal medium of the housing. However, when the gear pump is repaired and disassembled, the end cover needs to be removed. Because the end cover is welded to the housing, disassembly is difficult and may even lead to the direct scrapping of the product during the disassembly process. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a gear pump that allows for easy disassembly of the end cover.

[0005] This utility model embodiment provides a gear pump, the gear pump comprising:

[0006] The housing defines an inlet and an outlet, which are respectively connected to the interior of the housing. The housing has a sealing end, which is provided with a first connecting part and a limiting part.

[0007] An end cap assembly includes a locking member and an end cap. The locking member is provided with a second connecting part. The first connecting part and the second connecting part are detachably connected. The end cap is located between the locking member and the limiting part and is sealed to the sealing end.

[0008] The power unit is installed inside the housing and is used to drive the medium that enters the housing through the inlet to be output from the outlet.

[0009] The gear pump according to the embodiment of this utility model has at least the following beneficial effects:

[0010] By providing a first connecting part on the sealing end of the housing and detachably connecting the first connecting part and the second connecting part of the locking member, the locking member can be removed from the housing. Furthermore, a limiting part is provided on the sealing end, positioning the end cover between the locking member and the limiting part. That is, the locking member and the limiting part, located on opposite sides of the end cover, restrict the axial movement of the end cover relative to the housing, thereby fixing the end cover to the housing. When disassembling the gear pump is required, the locking member can be removed from the housing, and the end cover can be taken out. This avoids directly damaging the gear pump during disassembly, facilitating the removal of the gear end cover and thus simplifying gear pump maintenance. The structure is simple, and the production and maintenance costs are low.

[0011] According to some embodiments of the gear pump of the present invention, the first connecting part is a first thread, the second connecting part is a second thread, and the first thread and the second thread are threadedly connected.

[0012] According to some embodiments of the gear pump of the present invention, the first thread is provided on the circumferential inner side of the sealing end, and the second thread is provided on the circumferential outer side of the locking member.

[0013] The limiting part is located on the circumferential inner side of the sealing end, and the end cap is accommodated on the circumferential inner side of the sealing end.

[0014] According to some embodiments of the gear pump of the present invention, the locking element is ring-shaped.

[0015] According to some embodiments of the gear pump of the present invention, a groove is defined on the circumferential inner side of the locking member, and the groove is used to assist in rotating the locking member.

[0016] According to some embodiments of the gear pump of the present invention, the end cover assembly further includes a sealing ring, which is connected to the end cover and is used to seal the connection between the end cover and the sealing end.

[0017] According to some embodiments of the gear pump of the present invention, a groove is defined on the circumferential outer side of the end cover, the groove extends along the circumferential direction of the end cover, a sealing ring is sleeved on the end cover and accommodated in the groove, and the sealing ring seals the gap between the end cover and the sealing end.

[0018] According to some embodiments of the present invention, the gear pump end cap includes an end cap body and an elastic abutment portion, wherein the elastic abutment portion is connected to the end cap body.

[0019] The elastic abutment is provided on the side of the end cap facing the limiting part, and the elastic abutment abuts against the limiting part;

[0020] And / or, the elastic abutment portion is provided on the other side of the end cap body facing the locking member, and the elastic abutment portion abuts against the locking member.

[0021] According to some embodiments of the present invention, the gear pump has an elastic abutment portion that extends circumferentially along the end cover body.

[0022] According to some embodiments of the present invention, the gear pump has a power unit including a pump body, a motor assembly, and a gear assembly, all of which are housed inside a housing.

[0023] The pump body defines a first opening and a second opening, which are respectively connected to the interior of the pump body. The first opening is connected to the inlet and the second opening is connected to the outlet.

[0024] The motor assembly is housed inside the pump body. The motor assembly includes a stator and a rotor. The stator is fixedly connected to the pump body, and the rotor passes through the stator and is rotatably connected to the pump body.

[0025] The gear assembly is located on the axial outer side of the pump body. The gear assembly includes an internal gear and an external gear. The internal gear and the external gear mesh with each other. The internal gear is connected to the rotor, and a gear cavity is defined between the internal gear and the external gear. The gear cavity is connected to the second opening and the liquid outlet.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0028] Figure 1 A perspective view of the gear pump provided in an embodiment of this utility model;

[0029] Figure 2 for Figure 1 The top view of the gear pump shown;

[0030] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0031] Figure 4 for Figure 3 Enlarged view of part B;

[0032] Figure 5 for Figure 1 The diagram shown is an exploded view of the gear pump.

[0033] Figure label:

[0034] Gear pump 100;

[0035] Housing 10; Liquid inlet 101; Liquid outlet 102; Sealing end 11; First connecting part 11; Limiting part 112;

[0036] End cap assembly 20; locking member 21; second connecting part 211; groove 212; end cap 22; end cap body 221; elastic abutment part 222; groove 2201; pulling part 23;

[0037] Power unit 30; pump body 31; first opening 3101; second opening 3102; motor assembly 32; stator 321; rotor 322; gear assembly 33; internal gear 331; external gear 332; gear cavity 3301; bearing 34; gear cover plate 35; cover plate cavity 3501;

[0038] Sealing ring 40. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "multiple" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] like Figures 1 to 4 As shown, this utility model provides a gear pump 100, which includes a housing 10, an end cover assembly 20, and a power unit 30.

[0045] The housing 10 defines an inlet 101 and an outlet 102, which communicate with the interior of the housing 10. The housing 10 has a sealing end 11, which is provided with a first connecting portion 111 and a limiting portion 112. The end cap assembly 20 includes a locking member 21 and an end cap 22. The locking member 21 is provided with a second connecting portion 211, and the first connecting portion 111 and the second connecting portion 211 are detachably connected. The end cap 22 is located between the locking member 21 and the limiting portion 112 and is sealed to the sealing end 11 to prevent leakage of the internal medium of the housing 10. A power unit 30 is installed inside the housing 10 and is used to output the medium that enters the interior of the housing 10 through the inlet 101 from the outlet 102.

[0046] In this embodiment of the invention, by providing a first connecting portion 111 on the sealing end 11 of the housing 10 and detachably connecting the first connecting portion 111 and the second connecting portion 211 of the locking member 21, the locking member 21 can be removed from the housing 10. Furthermore, a limiting portion 112 is provided on the sealing end 11, and the end cover 22 is located between the locking member 21 and the limiting portion 112. That is, the locking member 21 and the limiting portion 112, respectively, from opposite sides of the end cover 22, restrict the end cover 22 from moving axially relative to the housing 10, thereby fixing the end cover 22 to the housing 10. When the gear pump 100 needs to be disassembled, the locking member 21 can be removed from the housing 10, and the end cover 22 can be taken out. This avoids directly damaging the gear pump 100 during disassembly, facilitates the disassembly of the gear end cover 22, and makes maintenance of the gear pump 100 easier. The structure is simple, and the production and maintenance costs are low.

[0047] like Figure 3 and Figure 4As shown, in some embodiments, the first connecting part 111 is a first thread, and the second connecting part 211 is a second thread, with the first thread and the second thread being threadedly connected. By adopting a threaded connection, the first connecting part 111 and the second connecting part 211 are detachably connected. During disassembly and assembly, it is only necessary to rotate the locking member 21 to connect or disconnect the first thread and the second thread, thereby realizing the disassembly and assembly of the locking member 21 on the housing 10. This ensures the convenience of disassembly and assembly of the locking member 21 on the housing 10 and facilitates the maintenance of the gear pump 100.

[0048] In some other embodiments, the first connecting part 111 and the second connecting part 211 can also be detachably connected in other ways. For example, one of the first connecting part 111 and the second connecting part 211 is a buckle, and the other of the first connecting part 111 and the second connecting part 211 is a slot. The buckle is engaged in the slot. When disassembling and assembling, the locking member 21 can be disassembled and assembled on the housing 10 simply by engaging or disengaging the buckle in the slot.

[0049] In some embodiments, a first thread is provided on the circumferential inner side of the sealing end 11, and a second thread is provided on the circumferential outer side of the locking member 21. A limiting portion 112 is provided on the circumferential inner side of the sealing end 11, and an end cap 22 is accommodated on the circumferential inner side of the sealing end 11.

[0050] In this embodiment, by setting the first thread and the limiting part 112 on the circumferential inner side of the sealing end 11, after the first thread and the second thread are threaded together and the end cover 22 and the sealing end 11 are sealed together, the first connecting part 111 and the end cover 22 are both located on the circumferential inner side of the sealing end 11. This avoids the increase in the radial dimension of the housing 10 caused by connecting the second connecting part 211 and the end cover 22 on the sealing end 11, making the structure at the sealing end 11 more compact. Without changing the radial dimension of the housing 10, the ease of installation and removal of the locking part 21 on the housing 10 is ensured, facilitating the maintenance of the gear pump 100.

[0051] like Figure 1 As shown, in some embodiments, the locking member 21 is annular, that is, the central part of the locking member 21 is hollow. In this way, the material used for the locking member 21 can be saved and the cost can be reduced. Furthermore, after the locking member 21 is locked to the sealing end 11, the locking member 21 can form a first annular structure on one side of the end cover 22 that abuts against the end cover 22, so that the locking member 21 can abut against the end cover 22 along the circumferential edge of the end cover 22, thereby enabling the locking member 21 and the end cover 22 to achieve a certain degree of sealing connection in the axial direction.

[0052] In some embodiments, the limiting portion 112 extends circumferentially along the sealing end 11 to form a second annular structure, thereby allowing the end cap 22 to be tightly clamped between the first annular structure and the second annular structure, and allowing the limiting portion 112 and the end cap 22 to achieve a certain degree of sealing connection in the axial direction.

[0053] In some embodiments, a groove 212 is defined on the circumferential inner side of the locking member 21. The groove 212 is used to assist in rotating the locking member 21 and to provide a force application point for removing the end cap 22 so as to facilitate rotating the locking member 21.

[0054] Among them, the groove 212 is a rectangular groove, and multiple grooves 212 are arranged at intervals along the circumference of the locking member 21. The external force-applying component can extend into the locking member 21 and cooperate with the groove 212 to realize the rotation of the locking member 21.

[0055] like Figure 4 As shown, in some embodiments, the end cap assembly 20 further includes a sealing ring 40, which is connected to the end cap 22 and is used to seal the connection between the end cap 22 and the sealing end 11 to prevent leakage of the internal medium of the housing 10.

[0056] In some embodiments, a groove 2201 is defined on the circumferential outer side of the end cover 22. The groove 2201 extends circumferentially along the end cover 22. A sealing ring 40 is fitted onto the end cover 22 and accommodated in the groove 2201. The sealing ring 40 seals the gap between the end cover 22 and the sealing end 11. In this way, a radial seal can be achieved between the end cover 22 and the sealing end 11, preventing the internal medium of the housing 10 from leaking from the gap between the end cover 22 and the sealing end 11.

[0057] In some other embodiments, the sealing ring 40 may also be disposed between the end cap 22 and the limiting part 112 to achieve axial sealing between the end cap 22 and the limiting part 112, thereby achieving sealing between the end cap 22 and the sealing end 11.

[0058] In some embodiments, the end cap 22 includes an end cap body 221 and an elastic abutment portion 222, which is connected to the end cap body 221. The elastic abutment portion 222 is disposed on the side of the end cap 22 facing the limiting portion 112, and abuts against the limiting portion 112; or, the elastic abutment portion 222 is disposed on the other side of the end cap body 221 facing the locking member 21, and abuts against the locking member 21; or, the end cap 22 is provided on the side facing the limiting portion 112 and the other side of the end cap body 221 facing the locking member 21, respectively, with the elastic abutment portion 222 on the side of the end cap 22 facing the limiting portion 112 abutting against the limiting portion 112, and the elastic abutment portion 222 on the other side of the end cap 22 facing the locking member 21 abutting against the locking member 21.

[0059] In this embodiment, by providing an elastic abutment portion 222, the elastic abutment portion 222 can generate an elastic force at the end cap body 221, so that the end cap 22 has a force against the locking member 21. After the locking member 21 is locked to the sealing end 11, a pre-tightening force can be provided to the locking member 21, so that the locking member 21 can be securely locked to the sealing end 11, avoiding the vibration generated by the gear pump 100 during operation from causing loosening between the locking member 21 and the sealing end 11, and ensuring the structural stability of the sealing end 11.

[0060] In some embodiments, the elastic abutment portion 222 extends circumferentially along the end cap body 221, such that the elastic abutment portion 222 extends to form an annular shape. In this way, the elastic abutment portion 222 generates a balanced elastic force along the circumferential direction of the end cap body 221, thereby providing a balanced preload force to the locking member 21 after it is locked to the sealing end 11. This facilitates a secure locking at the sealing end 11, ensuring the structural stability of the sealing end 11. Furthermore, the annular elastic abutment portion 222 can achieve a certain degree of axial sealing when it abuts against the limiting portion 112 and / or the locking member 21.

[0061] In some embodiments, the first end of the elastic abutment portion 222 is connected to the end cap body 221, and the second end of the elastic abutment portion 222 extends in a direction away from the end cap body 221. The radial dimension of the first end is smaller than the radial dimension of the second end. Thus, when the second end abuts against the limiting portion 112 and / or the locking member 21, the second end can expand outward in the radial direction and shorten the axial length of the elastic abutment portion 222, making it easier for the elastic abutment portion 222 to undergo elastic deformation and generate elastic force.

[0062] The second end can extend obliquely in a straight line relative to the end cap body 221, so that the elastic abutment portion 222 is frustum-shaped; the second end can also extend in an arc relative to the end cap body 221, so that the elastic abutment portion 222 is trumpet-shaped.

[0063] In some embodiments, the end cap 22 further includes a pulling part 23 connected to the end cap body 221. The pulling part 23 is used to assist in pulling out the end cap 22 inside the sealing end 11, providing a force application point for removing the end cap 22, so as to facilitate the removal of the end cap 22 and avoid the end cap body 221 being difficult to remove from the sealing end 11 due to its relatively flat surface.

[0064] In some embodiments, the pull part 23 is a pull ring structure.

[0065] In some embodiments, the housing 10 has two sealing ends 11, which are located at both ends of the housing 10 in the axial direction, and each sealing end 11 is connected to a set of end cap assemblies 20.

[0066] like Figure 3 and Figure 5 As shown, in some embodiments, the power unit 30 includes a pump body 31, a motor assembly 32, and a gear assembly 33, all of which are housed inside the housing 10.

[0067] The pump body 31 defines a first opening 3101 and a second opening 3102. The first opening 3101 and the second opening 3102 are respectively connected to the interior of the pump body 31. The first opening 3101 is connected to the liquid inlet 101, and the second opening 3102 is connected to the liquid outlet 102.

[0068] The motor assembly 32 is housed inside the pump body 31. The motor assembly 32 includes a stator 321 and a rotor 322. The stator 321 is fixedly connected to the pump body 31, and the rotor 322 passes through the stator 321 and is rotatably connected to the pump body 31.

[0069] The gear assembly 33 is located on the axial outer side of the pump body 31. The gear assembly 33 includes an internal gear 331 and an external gear 332. The internal gear 331 and the external gear 332 mesh with each other. The internal gear 331 is connected to the rotor 322, and a gear cavity 3301 is defined between the internal gear 331 and the external gear 332. The gear cavity 3301 is connected to the second opening 3102 and the liquid outlet 102.

[0070] The pump body 31 has two axially aligned ends that are sealed to the housing 10, and the connection between the inlet 101 and the first opening 3101 is located between the two axially aligned ends of the pump body 31. A gear assembly 33 is disposed at one axially aligned end of the pump body 31, between that end and the end cover 22, and the gear cavity 3301 communicates with the second opening 3102. The second opening 3102 is located between the axially aligned end of the pump body 31 and the end cover 22, and communicates with the gear cavity 3301.

[0071] In some embodiments, the gear pump 100 further includes a rotary bearing 34 and a gear cover plate 35. Rotary bearings 34 are respectively provided at both ends of the pump body 31 in the axial direction. Both ends of the rotor 322 are respectively connected to the rotary bearings 34 at both ends of the pump body 31 in the axial direction to realize the rotational connection between the rotor 322 and the pump body 31. The gear cover plate 35 is connected to the side of the external gear 332 opposite to the pump body 31. The gear cover plate 35 defines a cover plate cavity 3501, which is connected to the gear cavity 3301 and the liquid outlet 102 respectively.

[0072] The medium enters the pump body 31 through the inlet 101 and the first opening 3101 in sequence, and is then output to the outside through the second opening 3102, the gear cavity 3301, the cover plate cavity 3501 and the outlet 102.

[0073] During operation, by inputting current into the stator 321, the stator 321 can generate a changing magnetic field, which drives the rotor 322 to rotate around its own axis. The rotor 322 drives the internal gear 331 to rotate. The internal gear 331 and the external gear 332 mesh and rotate. After the medium enters the interior of the pump body 31, it enters the gear cavity 3301 through the second opening 3102. The kinetic energy of the internal gear 331 and the external gear 332 is converted into the pressure energy of the medium, and drives the medium through the cover plate cavity 3501, so that the medium is output to the outside through the liquid outlet 102.

[0074] Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this utility model. Furthermore, embodiments of this utility model and features thereof can be combined with each other, unless otherwise specified.

Claims

1. A gear pump, characterized in that, include: The housing defines an inlet and an outlet, the inlet and outlet being connected to the interior of the housing respectively, and the housing having a sealing end, the sealing end being provided with a first connecting part and a limiting part; An end cap assembly, the end cap assembly including a locking member and an end cap, the locking member being provided with a second connecting portion, the first connecting portion and the second connecting portion being detachably connected, the end cap being located between the locking member and the limiting portion, and being sealed to the sealing end; A power unit, installed inside the housing, is used to output the medium that enters the housing through the inlet from the outlet.

2. The gear pump according to claim 1, characterized in that, The first connecting part is a first thread, the second connecting part is a second thread, and the first thread and the second thread are threadedly connected.

3. The gear pump according to claim 2, characterized in that, The first thread is located on the inner circumferential side of the sealing end, and the second thread is located on the outer circumferential side of the locking member; The limiting part is disposed on the circumferential inner side of the sealing end, and the end cap is accommodated on the circumferential inner side of the sealing end.

4. The gear pump according to claim 2, characterized in that, The locking element is ring-shaped.

5. The gear pump according to claim 4, characterized in that, The locking member has a groove defined on its circumferential inner side, which is used to assist in rotating the locking member.

6. The gear pump according to claim 1, characterized in that, The end cap assembly also includes a sealing ring, which is connected to the end cap and is used to seal the connection between the end cap and the sealing end.

7. The gear pump according to claim 6, characterized in that, A groove is defined on the circumferential outer side of the end cap, the groove extends circumferentially along the end cap, the sealing ring is fitted onto the end cap and accommodated in the groove, and the sealing ring seals the gap between the end cap and the sealing end.

8. The gear pump according to claim 1, characterized in that, The end cap includes an end cap body and an elastic abutment portion, wherein the elastic abutment portion is connected to the end cap body; The elastic abutment portion is disposed on the side of the end cap facing the limiting portion, and the elastic abutment portion abuts against the limiting portion; And / or, the elastic abutment portion is disposed on the other side of the end cap body facing the locking member, and the elastic abutment portion abuts against the locking member.

9. The gear pump according to claim 8, characterized in that, The elastic abutment portion extends circumferentially along the end cap body.

10. The gear pump according to claim 1, characterized in that, The power unit includes a pump body, a motor assembly, and a gear assembly, all of which are housed inside the housing. The pump body defines a first opening and a second opening, the first opening and the second opening respectively communicating with the interior of the pump body, the first opening communicating with the liquid inlet, and the second opening communicating with the liquid outlet; The motor assembly is housed inside the pump body. The motor assembly includes a stator and a rotor. The stator is fixedly connected to the pump body, and the rotor passes through the stator and is rotatably connected to the pump body. The gear assembly is disposed on the axial outer side of the pump body. The gear assembly includes an internal gear and an external gear. The internal gear and the external gear mesh with each other. The internal gear is connected to the rotor, and a gear cavity is defined between the internal gear and the external gear. The gear cavity communicates with the second opening and the liquid outlet.

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