Novel wave spring for internal gear pump

Abstract

The utility model discloses a novel wave spring for an internal gear pump, which comprises a pump body, a first moon-shaped pressing plate and a second moon-shaped pressing plate which are arranged in the pump body, a sealing rod arranged between the first moon-shaped pressing plate and the second moon-shaped pressing plate, and a wave spring body arranged between the sealing rod and the first moon-shaped pressing plate, guide rings are arranged at the two ends of the wave spring body, a plurality of positioning blocks are integrally formed on the outer sides of the guide rings, and a plurality of through holes which are annularly distributed at equal intervals are formed in the wave spring body and the guide rings in a penetrating mode. The wave spring body is prevented from deviating, and it is ensured that the wave spring body can apply enough pressure to the sealing rod and the first moon-shaped pressing plate, so that the sealing state between the first moon-shaped pressing plate and the second moon-shaped pressing plate is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of springs, in particular to a novel wave spring for an internal meshing gear pump. Background Art

[0002] A wave spring is an elastic element with several peaks and valleys on a thin metal ring. It is usually formed by stamping a thin steel plate and has multiple peaks evenly distributed on the circumference. This spring has the ability to save space, so it is particularly suitable for applications that require weight reduction and applications that are restricted by a smaller installation space. They are widely used in multiple industries such as machinery manufacturing, petrochemicals, and hydraulic equipment. For example, the Chinese patent announcement number CN212803562U discloses a new type of internal meshing gear pump. The utility model uses a wave spring to tightly squeeze the sealing rod with the first crescent plate and the second crescent plate to ensure the sealing state between the first crescent plate and the second crescent plate, avoid the high-pressure oil in the high-pressure chamber from communicating with the low-pressure chamber through the inside of the crescent plate assembly, and can also effectively ensure that the first crescent plate and the second crescent plate are in close contact with the tooth tops of the driving gear and the inner gear ring respectively, thereby ensuring the high volumetric efficiency of the oil pump when working at high pressure.

[0003] However, in actual use, since the two ends of the wave spring are uneven, the wave spring is prone to offset under the action of oil pressure, resulting in the wave spring being unable to exert sufficient pressure, which will affect the normal operation of the gear pump. Utility Model Content

[0004] The utility model aims to provide a novel wave spring for an internal gear pump to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of wave spring for an internal gear pump, comprising a pump body, a first moon pressure plate and a second moon pressure plate installed inside the pump body, a sealing rod arranged between the first moon pressure plate and the second moon pressure plate, and a wave spring body arranged between the sealing rod and the first moon pressure plate, guide rings are provided at both ends of the wave spring body, a plurality of positioning blocks are integrally formed on the outer side of the guide ring, and a plurality of through holes equidistantly distributed in a ring shape are penetrated through the wave spring body and the guide ring.

[0006] As a preferred solution of the utility model, the first moon pressure plate and the sealing rod are both provided with positioning grooves matching the positioning block, and the first moon pressure plate and the sealing rod are also provided with an annular groove matching the guide ring, and the annular groove is connected to the positioning groove.

[0007] As a preferred solution of the present invention, the guide ring is connected and fixed to the wave spring body by welding.

[0008] As a preferred solution of the utility model, the center of the guide ring and the center of the wave spring body are on the same straight line.

[0009] As a preferred solution of the present utility model, the cross section of the positioning block is semicircular.

[0010] As a preferred solution of the present invention, the wave spring body and the guide ring are both made of silicon-manganese spring steel.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a ring and a positioning block to position the wave spring body, thereby preventing the wave spring body from being offset, ensuring that the wave spring body can apply sufficient pressure to the sealing rod and the first moon pressure plate to ensure the sealing state between the first moon pressure plate and the second moon pressure plate, and at the same time, the effective cross-sectional area of ​​the wave spring body can be reduced by providing a through hole, so that part of the liquid can flow through the wave spring body, thereby reducing the pressure on the wave spring body, and then reducing the force of the oil pressure on the wave spring body, which can not only reduce the probability of the wave spring body being offset due to the oil pressure, but also extend the service life of the wave spring body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the spring body of the utility model;

[0013] Figure 2 This is the front view of the spring body of the utility model;

[0014] Figure 3 It is a cross-sectional view of the pump body of the utility model;

[0015] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle.

[0016] In the figure: 1. wave spring body; 2. guide ring; 3. through hole; 4. positioning block; 5. pump body; 6. first month pressure plate; 7. second month pressure plate; 8. sealing rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 4The utility model provides a technical solution: a new type of wave spring for an internal gear pump, comprising a pump body 5, a first moon pressure plate 6 and a second moon pressure plate 7 installed inside the pump body 5, a sealing rod 8 arranged between the first moon pressure plate 6 and the second moon pressure plate 7, and a wave spring body 1 arranged between the sealing rod 8 and the first moon pressure plate 6, both ends of the wave spring body 1 are provided with a guide ring 2, the outer side of the guide ring 2 is integrally formed with a plurality of positioning blocks 4, the guide ring 2 and the positioning blocks 4 are used to position the wave spring body 1, prevent the wave spring body 1 from deflecting, and ensure that the wave spring body 1 Sufficient pressure can be applied to the sealing rod 8 and the first moon pressure plate 6 to ensure the sealing state between the first moon pressure plate 6 and the second moon pressure plate 7. The wave spring body 1 and the guide ring 2 are penetrated by a plurality of through holes 3 equidistantly distributed in an annular shape. The through holes 3 can reduce the effective cross-sectional area of ​​the wave spring body 1, so that part of the liquid can flow through the wave spring body 1, thereby reducing the pressure on the wave spring body 1, and further reducing the force of the oil pressure on the wave spring body 1. This can not only reduce the probability of the wave spring body 1 being offset due to the oil pressure, but also extend the service life of the wave spring body 1.

[0019] Among them, the first moon pressure plate 6 and the sealing rod 8 are both provided with positioning grooves matching the positioning block 4. The first moon pressure plate 6 and the sealing rod 8 are also provided with annular grooves matching the guide ring 2. The annular groove is connected to the positioning groove, the guide ring 2 is inserted into the annular groove, and the positioning block 4 is inserted into the positioning groove to avoid deviation between the guide ring 2 and the positioning block 4, thereby playing a positioning role for the wave spring body 1.

[0020] The guide ring 2 is connected and fixed to the wave spring body 1 by welding.

[0021] The center of the guide ring 2 and the center of the wave spring body 1 are located on the same straight line, so that the force transmission between the guide ring 2 and the wave spring body 1 is more uniform.

[0022] The cross section of the positioning block 4 is semicircular. Since the cross section of the positioning block 4 is circular, the cross section of the positioning groove is also circular, and the circular shape is convenient for processing.

[0023] The wave spring body 1 and the guide ring 2 are both made of silicon-manganese spring steel. Silicon-manganese spring steel has good fatigue resistance, is not prone to breakage and deformation, and also has excellent corrosion resistance, so it has a long service life.

[0024] Specifically, when in use, the guide ring 2 is inserted into the annular groove, and the positioning block 4 is inserted into the positioning groove to prevent the guide ring 2 and the positioning block 4 from offsetting, thereby playing a positioning role for the wave spring body 1 and preventing the wave spring body 1 from offsetting, and the through hole 3 can reduce the effective cross-sectional area of ​​the wave spring body 1, so that part of the liquid can flow through the wave spring body 1, thereby reducing the pressure on the wave spring body 1, further reducing the probability of the wave spring body 1 offsetting, and ensuring that the wave spring body 1 can apply sufficient pressure to the sealing rod 8 and the first moon pressure plate 6 to ensure the sealing state between the first moon pressure plate 6 and the second moon pressure plate 7.

[0025] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0027] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel wave spring for an internal gear pump, comprising a pump body (5), a first moon pressure plate (6) and a second moon pressure plate (7) installed inside the pump body (5), a sealing rod (8) arranged between the first moon pressure plate (6) and the second moon pressure plate (7), and a wave spring body (1) arranged between the sealing rod (8) and the first moon pressure plate (6), characterized in that: Both ends of the wave spring body (1) are provided with guide rings (2), the outer side of the guide ring (2) is integrally formed with a plurality of positioning blocks (4), and the wave spring body (1) and the guide ring (2) are both penetrated by a plurality of through holes (3) distributed in an annular shape and at equal intervals.

2. The novel wave spring for an internal gear pump according to claim 1 is characterized in that: The first moon pressure plate (6) and the sealing rod (8) are both provided with positioning grooves matching the positioning block (4), and the first moon pressure plate (6) and the sealing rod (8) are also provided with an annular groove matching the guide ring (2), and the annular groove is connected to the positioning groove.

3. The novel wave spring for an internal gear pump according to claim 1 is characterized in that: The guide ring (2) is connected and fixed to the wave spring body (1) by welding.

4. The novel wave spring for an internal gear pump according to claim 1 is characterized in that: The center of the guide ring (2) and the center of the wave spring body (1) are located on the same straight line.

5. The novel wave spring for an internal gear pump according to claim 1 is characterized in that: The cross section of the positioning block (4) is semicircular.

6. The novel wave spring for an internal gear pump according to claim 1 is characterized in that: The wave spring body (1) and the guide ring (2) are both made of silicon-manganese spring steel.

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