Internal gear pump
By incorporating a compensation plate and elastic clamping element into the internal gear pump, combined with a diversion groove and permanent magnet drive, the problems of gear pump leakage and high manufacturing difficulty are solved, achieving stable sealing and efficient operation, and reducing manufacturing complexity.
Patent Information
- Application Number
- CN202423277649.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing internal gear pumps suffer from leakage due to their large sliding interface, resulting in low working efficiency. They also have high manufacturing and assembly requirements, poor economic efficiency, and increased clearance after component wear, leading to a decline in performance.
A compensation plate and an elastic clamping component are installed on one side of the gear set and the shaft. The clamping force is provided by the elastic clamping component, so that the compensation plate fits tightly against the gear set to achieve end face sealing and radial sealing. High pressure is introduced by the diversion groove to increase the fitting force. Flexible materials and permanent magnets are used to drive the gear to rotate.
It achieves a stable seal between the gear set and the shaft, preventing leakage, maintaining efficient operation, with a simple structure, easy manufacturing, and permanent control over the clearance.
Smart Images
Figure CN223594420U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gear pump technical field, concretely relates to a kind of internal meshing gear pump. BACKGROUND
[0002] Internal meshing gear pump is a kind of volumetric pump widely used in fluid delivery system, the existing internal meshing gear pump due to its structural characteristics, sliding interface is larger, when working, there is mutual motion between mutually meshing gear and its and shell, can produce leakage, cause working efficiency to drop, energy consumption increases.Conventional design is strictly set tolerance, ensure that gap is smaller, but this kind of practice can lead to gear pump's manufacture and assembly requirement is high, poor economy, in addition, component wear can lead to gap to become larger, reduce the performance of internal meshing gear pump. SUMMARY
[0003] In order to overcome the defects in the prior art, the utility model embodiment provides a kind of internal meshing gear pump, can realize the radial sealing between the end face of gear set one side and gear set and rotating shaft.
[0004] To achieve the above object, the utility model adopts the technical scheme that:
[0005] The utility model discloses a kind of internal meshing gear pump, comprising:
[0006] Shell assembly, the shell assembly is equipped with import and export, the shell assembly includes first body, second body and shell, the first body, the second body and the shell are collectively enclosed to form first inner chamber;
[0007] Gear set, the gear set is located in the first inner chamber;
[0008] Rotating shaft, the rotating shaft is located in the shell assembly, and is connected with the gear set, the rotating shaft is equipped with compensating plate and elastic compression piece, the compensating plate is located at the side of the gear set away from the first body, the elastic compression piece is located between the compensating plate and the second body, one end of the elastic compression piece is in contact with the second body, the other end is in contact with the compensating plate, so that the compensating plate is attached to the gear set.
[0009] The above technical scheme is by being provided with compensating plate and elastic compression piece in contact between compensating plate and second body on one side of gear set and rotating shaft, and elastic compression piece provides compression force, and the compensating plate is tightly attached on gear set, to realize the sealing of the end face of the side of gear set away from first body and the stable gap control, and the radial sealing of the connection place of gear set and rotating shaft, and simple structure, easy to manufacture.
[0010] Further, the compensation plate is provided with a through hole, the compensation plate extends from the through hole to a direction away from the gear set to form an extension part, and the extension part is attached to the rotating shaft when the compensation plate is sleeved on the rotating shaft, so that at least part of the rotating shaft close to the gear set is radially sealed.
[0011] Further, the first body is provided with a drainage groove, one end of the drainage groove is communicated with the inlet of the shell assembly, and the other end passes through the first inner cavity and is communicated with the outlet of the shell assembly. By opening the drainage groove in the first body, the pressure on the high-pressure side of the shell assembly is introduced into the first inner cavity, thereby exerting pressure on the compensation plate and further increasing the attachment force of the compensation plate to the end face of the gear set and the rotating shaft.
[0012] Further, the gear set comprises an inner gear and an outer gear, and a fixed spacer is arranged on the outer periphery of the outer gear, and the compensation plate is attached to the inner gear, the outer gear and the fixed spacer, and the inner gear, the outer gear and the rotating shaft rotate relative to the compensation plate.
[0013] Further, the shell assembly further comprises a cover plate, the cover plate is located on the side of the second body away from the first body, the cover plate is connected with the second body to form a second inner cavity.
[0014] Further, a permanent magnet is further included, the permanent magnet is located in the second inner cavity, and the permanent magnet is connected with the rotating shaft. The permanent magnet is connected with the rotating shaft to drive the rotating shaft to rotate, and the rotating shaft drives the gear set to rotate, thereby sucking and extruding the fluid.
[0015] Further, the material of the compensation plate is PTFE. The compensation plate is made of a flexible material with low friction coefficient and low stiffness, so that the extension part of the compensation plate is better attached to the rotating shaft, and the rotating shaft is radially sealed.
[0016] Further, the elastic compression part comprises a spring.
[0017] Further, the inlet and the outlet of the shell assembly are arranged on the first body. Arranging the inlet and the outlet on the first body can simplify the structural design of the internal gear pump.
[0018] Further, the first body is further provided with a high-pressure cavity and a low-pressure cavity, the high-pressure cavity is communicated with the inlet of the shell assembly and the gear set, and the low-pressure cavity is communicated with the outlet of the shell assembly and the gear set. The high-pressure cavity is communicated with the inlet, so that the drainage groove introduces high pressure, thereby introducing the pressure on the high-pressure side of the shell assembly into the first inner cavity, and further increasing the attachment force of the compensation plate to the gear set and the rotating shaft.
[0019] Due to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:
[0020] The application sets the compensation plate on the side of the gear set and the rotating shaft, and sets the elastic compression member between the compensation plate and the second machine body, the elastic compression member provides compression force, and the compensation plate is tightly attached to the gear set, so that the end face of the gear set away from the first machine body is sealed, and the radial seal of the connection between the gear set and the rotating shaft is realized, and the structure is simple and convenient to manufacture.
[0021] For the above and other objects, features and advantages of the present application, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0022] 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 of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0023] Figure 1 is a sectional view of an internal gear pump provided by the embodiment of the present application;
[0024] Figure 2 is a structural diagram of an internal gear pump provided by the embodiment of the present application;
[0025] Figure 3 is a structural diagram of another internal gear pump provided by the embodiment of the present application;
[0026] Figure 4 is a structural diagram of a compensation plate provided by the embodiment of the present application.
[0027] The above drawings are marked as follows: 1, first machine body; 101, inlet; 102, outlet; 2, second machine body; 3, shell; 4, gear set; 401, internal gear; 402, external gear; 403, fixed spacer; 5, rotating shaft; 6, compensation plate; 601, extension; 7, elastic compression member; 8, drainage groove; 9, cover plate; 10, permanent magnet; 11, high pressure cavity; 12, high pressure cavity. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. In addition, the drawings of the present application are only simple schematic illustrations, not the actual size description, and the prior declaration is made.
[0029] In the utility model, it needs to be explained that, the terms "upper", "lower", "inner", "outer", "forward", "backward", "between", "close to", "far away" and the like indicate the position or location relationship based on the position or location 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. It also needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, and can be directly connected, or indirectly connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0030] It should be understood that although the terms "first", "second", "third" and the like can be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein can include any one or more combinations of the associated listed items.
[0031] With reference to Figures 1-4 The embodiment of the present application provides an internal gear pump, comprising a shell assembly, the shell assembly is provided with an inlet 101 and an outlet 102, the shell assembly comprises a first body 1, a second body 2 and an outer shell 3, the first body 1, the second body 2 and the outer shell 3 jointly enclose a first inner cavity, the first inner cavity is provided with a gear set 4 and a rotating shaft 5, the rotating shaft 5 is connected with the gear set 4, wherein the rotating shaft 5 is provided with a compensation plate 6 and an elastic pressing piece 7, the compensation plate 6 is located on the side, away from the first body 1, of the gear set 4, the elastic pressing piece 7 is arranged between the compensation plate 6 and the second body 2, one end of the elastic pressing piece 7 abuts against the second body 2, and the other end abuts against the compensation plate 6, so that the compensation plate 6 is attached to the gear set 4.
[0032] Through the above structure, the elastic pressing piece 7 in the embodiment of the present application can provide a pressing force, so that the compensation plate 6 is tightly attached to the gear set 4, thereby realizing the sealing of the side end face, away from the first body 1, of the gear set 4 and the radial sealing of the connection part of the gear set 4 and the rotating shaft 5, avoiding leakage, so that the gear pump can always maintain high-efficiency operation, and permanent and stable gap control can be realized, and the structure is simple and convenient to manufacture.
[0033] Specifically, as Figure 1As shown, the first body 1 and the second body 2 are arranged at two ends of the gear pump, the inlet 101 and the outlet 102 of the shell assembly are arranged on the first body 1, and the shell 3 is connected to the first body 1 and the second body 2, so that the first body 1, the second body 2 and the shell 3 jointly form the first inner cavity, and the gear set 4 is located in the first inner cavity.
[0034] The gear set 4 includes an inner gear 401, an outer gear 402 and a fixed spacer 403 arranged on the outer periphery of the outer gear 402, the compensation plate 6 is attached to the inner gear 401, the outer gear 402 and the fixed spacer 403, the rotating shaft 5 is connected to the inner gear 401, and the inner gear 401, the outer gear 402 and the rotating shaft 5 rotate relative to the compensation plate 6.
[0035] In a possible embodiment, the elastic compression member 7 is a spring, as shown in Figure 2 and Figure 3 As shown, the two ends of the spring abut against the end face of the second body 2 towards the first body 1 and the compensation plate 6 respectively, so as to jointly generate an axial rebound force, so that under the action of the elastic compression member 7, one side end face of the gear set 4 is tightly attached to the compensation plate 6, thereby avoiding fluid leakage.
[0036] Specifically, as shown in Figure 4 The compensation plate 6 is provided with a through hole for sleeving the compensation plate 6 on the rotating shaft 5, the compensation plate 6 extends from the through hole to the direction away from the gear set 4 to form an extension 601, and when the compensation plate 6 is sleeved on the rotating shaft 5, the extension 601 abuts against the rotating shaft 5, thereby realizing radial sealing of the connection between the rotating shaft 5 and the gear set 4.
[0037] In order to make the compensation plate 6 and the gear set 4 form a tighter attachment, in a possible embodiment, a drainage groove is formed on the first body 1, one end of the drainage groove is communicated with the inlet 101 of the shell assembly, the other end passes through the first inner cavity and is communicated with the outlet 102 of the shell assembly, so as to introduce high pressure into the first inner cavity and apply pressure to the compensation plate 6, so as to make the compensation plate 6 and the gear set 4 and the rotating shaft 5 more tightly attached, and the drainage groove can be formed in various ways, in the embodiment of the present application, the path of the drainage groove into the first inner cavity is shown by an arrow in Figure 1 .
[0038] As shown in Figure 1 The first body 1 is provided with a high-pressure cavity 11 and a low-pressure cavity 12, the high-pressure cavity 11 is communicated with the inlet 101 of the shell assembly and the gear set 4, and the low-pressure cavity 12 is communicated with the outlet 102 of the shell assembly and the gear set 4, so that the drainage groove introduces high pressure in the high-pressure cavity 11 into the first inner cavity.
[0039] In order to make the extension 601 and the rotating shaft 5 good fit, the compensation plate 6 is made of relatively flexible material, and in a possible embodiment, the material of the compensation plate 6 is PTFE.
[0040] As shown in Figure 1 The shell assembly further comprises a cover plate 9, which is located on the side of the second body 2 away from the first body 1 and is connected with the second body 2 to form a second inner cavity, and a permanent magnet 10 is arranged in the second inner cavity, and the permanent magnet 10 is connected with the rotating shaft 5 to drive the rotating shaft 5 to rotate and drive the gear set 4 to rotate.
[0041] When working, the rotating shaft 5 drives the inner gear 401 to rotate, and the inner gear 401 drives the outer gear 402 to rotate to separate and mesh with each other to suck and extrude fluid, and since the compensation plate 6 and the elastic compression piece 7 are arranged on the other side of the gear set 4, the two ends of the elastic compression piece 7 abut against the end face of the second body 2 towards the first body 1 and the compensation plate 6 respectively, and the axial rebound force is generated together, so that under the action of the elastic compression piece 7, the compensation plate 6 is tightly attached to the end face of the gear set 4, and the extension on the compensation plate 6 is tightly attached to the rotating shaft 5, so that the end face of the gear set 4 and the connection between the rotating shaft 5 and the gear set 4 are sealed, and permanent and stable gap control can be achieved, so that the gear pump can always work efficiently and stably.
[0042] The principle and implementation mode of the utility model are described in the specific embodiments, and the above embodiment is only used to help understand the method and core idea of the utility model; meanwhile, for the general skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the utility model.
Claims
1. An internal gear pump characterized by, The utility model relates to a kind of high-pressure water pump, including: Shell assembly, the shell assembly is equipped with import and export, the shell assembly includes first body, second body and shell, and the first body, the second body and the shell are enclosed to form first inner cavity together; Gear set, the gear set is located in the first inner cavity; Shaft, the shaft is located in the shell assembly, and is connected with the gear set, the shaft is equipped with compensation plate and elastic compression piece, the compensation plate is located at the side of the gear set away from the first body, the elastic compression piece is located between the compensation plate and the second body, one end of the elastic compression piece is in contact with the second body, and the other end is in contact with the compensation plate, so that the compensation plate is attached to the gear set.
2. An internal gear pump according to claim 1, wherein The compensation plate is provided with a through hole, and the compensation plate extends to form an extension part away from the gear set from the through hole, and the extension part is attached to the shaft when the compensation plate is sleeved on the shaft.
3. An internal gear pump according to claim 1, wherein The first body is provided with a drainage groove, one end of the drainage groove is communicated with the import of the shell assembly, and the other end passes through the first inner cavity and is communicated with the export of the shell assembly.
4. An internal gear pump according to claim 1, wherein The gear set includes an inner gear, an outer gear and a fixed spacer arranged on the outer periphery of the outer gear, the compensation plate is attached to the inner gear, the outer gear and the fixed spacer, and the inner gear, the outer gear and the shaft rotate relative to the compensation plate.
5. An internal gear pump according to claim 1, wherein The shell assembly further includes a cover plate, the cover plate is located on the side of the second body away from the first body, and the cover plate is connected with the second body to form a second inner cavity.
6. An internal gear pump according to claim 5, wherein, It also includes a permanent magnet, the permanent magnet is located in the second inner cavity, and the permanent magnet is connected with the shaft.
7. An internal gear pump as set forth in claim 1 wherein, The material of the compensation plate is PTFE.
8. An internal gear pump according to claim 1, wherein The elastic compression piece includes a spring.
9. An internal gear pump according to claim 1, wherein The import and export of the shell assembly are located on the first body.
10. An internal gear pump according to claim 9, wherein, The first body is also provided with a high-pressure cavity and a low-pressure cavity, the high-pressure cavity is communicated with the import of the shell assembly and the gear set, and the low-pressure cavity is communicated with the export of the shell assembly and the gear set.