Diaphragm pump structure capable of adjusting dynamic balance

Abstract

The utility model discloses a diaphragm pump structure capable of adjusting dynamic balance, which comprises a crankshaft comprising a first shaft section and a second shaft section, the crankshaft is provided with a shaft hole along the axial direction of the crankshaft, the center line of the shaft hole is parallel to and does not coincide with the center line of the first shaft section, and the center line of the shaft hole is coincide with the center line of the second shaft section; the motor shaft penetrates through the crankshaft through the shaft hole, and the motor shaft is fixedly connected with the crankshaft; the first shaft section is sleeved with the crank support, and the first shaft section is connected with the crank support through a bearing; the diaphragm assembly is arranged on the crank bracket; the balance sleeve is arranged on the second shaft section in a sleeving manner; and the balancing weight is detachably locked on the balancing sleeve. According to the diaphragm pump structure capable of adjusting the dynamic balance, when the external load of the diaphragm pump changes, different configurations can be achieved by replacing the balancing weights with different loads, manual adjustment of the dynamic balance is completed, inertia force of rotating components is offset, the diaphragm pump achieves the optimal dynamic balance, and the vibration amplitude is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm pump technology, specifically relating to an adjustable dynamic balance diaphragm pump structure. Background Technology

[0002] Currently, existing diaphragm pumps mainly rely on a motor to drive an eccentric wheel, which in turn drives the diaphragm to reciprocate. Because the eccentric wheel generates periodic centrifugal force when rotating, it creates an imbalance of inertial forces, which in turn causes vibration and noise, reducing the service life of other internal parts.

[0003] Traditional dynamic balancing designs can, to some extent, cancel out the inertial forces of rotating components, thus reducing vibration amplitude. However, when the external load on the diaphragm pump changes, the dynamic balance also changes. Traditional dynamic balancing designs are mostly fixed, integrated structures that cannot adjust the dynamic balance. As a result, the inertial forces of the rotating components cannot cancel each other out, leading to increased vibration of the diaphragm pump and affecting the service life of other internal parts. Therefore, an adjustable dynamic balancing diaphragm pump structure was designed to solve these problems.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide an adjustable dynamic balance diaphragm pump structure.

[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: an adjustable dynamically balanced diaphragm pump structure, comprising:

[0007] A crankshaft, comprising a first shaft segment and a second shaft segment, wherein the diameter of the second shaft segment is larger than the diameter of the first shaft segment, and the crankshaft has a shaft hole along its axial direction, wherein the center line of the shaft hole is parallel to and does not coincide with the center line of the first shaft segment, and the center line of the shaft hole coincides with the center line of the second shaft segment; a gap is provided between the first shaft segment and the second shaft segment;

[0008] A motor shaft is connected to the motor body. The motor shaft passes through the crankshaft via the shaft hole, and the motor shaft and the crankshaft are fixedly connected. The crankshaft rotates synchronously with the motor shaft.

[0009] A crank bracket is sleeved on the outside of the first shaft segment, and the first shaft segment and the crank bracket are connected by a bearing; the outer surface of the first shaft segment is fixedly connected to the inner ring of the bearing, and the inner surface of the crank bracket is fixedly connected to the outer ring of the bearing.

[0010] A diaphragm assembly is disposed on the crank bracket;

[0011] A balancing sleeve, which is fitted onto the second shaft segment;

[0012] A counterweight, which is detachably locked onto the balance sleeve.

[0013] Furthermore, the crank bracket is composed of an integral ring and a column, with the column fixed to the radial outer surface of the ring, and the diaphragm assembly connected to the column. In this design, the crank bracket has a ring portion connected to the bearing, resulting in more uniform force distribution and a more stable structure; the crank bracket also has a column portion connected to the diaphragm assembly, making installation more convenient.

[0014] Furthermore, the diaphragm assembly includes a diaphragm sheet and a moving component, the lower end of which is fastened to the inner hole of a nut. In this design, the moving component is connected to the crank bracket via a nut, improving the ease of connection between the moving component and the crank bracket.

[0015] Furthermore, the nut is embedded in the crank bracket. In this design, the nut-embedded structure facilitates disassembly and better restricts the circumferential freedom of the moving parts.

[0016] Furthermore, the first shaft segment is located on the side closer to the motor body, while the second shaft segment is located on the side farther from the motor body. In this design, the second shaft segment is located on the side farther from the motor body, which facilitates the replacement and adjustment of the counterweight and makes operation more convenient.

[0017] Furthermore, the balance sleeve is fixedly connected to the crankshaft and motor shaft via a first locking element, which is a fastening screw. In this design, the fastening screw is used to fix the balance sleeve and crankshaft together to the motor shaft, improving the consistency of movement among the balance sleeve, crankshaft, and motor shaft.

[0018] Furthermore, the counterweight is detachably connected to the balance sleeve via a second locking element, which is a countersunk screw. In this design, the countersunk screw connects the counterweight to the balance sleeve, limiting the movement of the counterweight's outer surface and improving structural stability.

[0019] Furthermore, the first locking member and the second locking member are respectively disposed on opposite radial sides of the balance sleeve. In this design, the first locking member and the second locking member are positioned opposite each other, so that the radial force on the balance sleeve can be relatively stable.

[0020] Furthermore, the balancing sleeve has several evenly distributed through holes along its circumference. In this design, the through holes reduce the overall weight of the balancing sleeve and facilitate the installation of multiple counterweights.

[0021] Furthermore, the system also includes a housing with mounting holes and an inspection port. The diaphragm assembly is disposed at the mounting holes, which are located on different sides. In this design, the housing protects the internal structure of the diaphragm pump, while the inspection port facilitates inspection and maintenance of the internal structure.

[0022] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0023] The adjustable dynamic balance diaphragm pump structure designed in this utility model allows for different configurations to be achieved by replacing the counterweights with different loads when the external load of the diaphragm pump changes. This enables manual adjustment of the dynamic balance, allowing the inertial forces of the rotating parts to cancel each other out, thus achieving optimal dynamic balance for the diaphragm pump, reducing vibration amplitude, and extending the service life of other internal parts. Moreover, the overall structure is simple in design, has low production cost, good overall structural stability, low vibration of the diaphragm pump, and strong practicality, making it suitable for widespread application. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the diaphragm pump of this utility model;

[0025] Figure 2 This is a side view of the diaphragm pump structure of this utility model (excluding the outer casing);

[0026] Figure 3 This is a cross-sectional view (AA) of the present invention;

[0027] Figure 4 This is a schematic diagram of the diaphragm pump part of the present invention;

[0028] Figure 5 This is a schematic diagram of the crankshaft structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the connection structure between the crankshaft and the balance sleeve of this utility model;

[0030] Figure 7 This is a schematic diagram of the connection structure between the diaphragm assembly and the crank bracket of this utility model;

[0031] In the above attached figures, 1. Crankshaft; 101. First shaft section; 102. Second shaft section; 103. Shaft hole; 2. Motor shaft; 3. Motor body; 4. Crank bracket; 401. Ring body; 402. Column body; 5. Bearing; 6. Diaphragm assembly; 601. Diaphragm sheet; 602. Moving part; 7. Balance sleeve; 8. Counterweight; 9. Nut; 10. First locking element; 11. Second locking element; 12. Through hole; 13. Housing; 14. Mounting hole; 15. Inspection port. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0033] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0037] Example:

[0038] See appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, this embodiment provides an adjustable dynamically balanced diaphragm pump structure, including: a crankshaft 1, see attached diagram. Figure 5 As shown, the crankshaft 1 includes a first shaft section 101 and a second shaft section 102. The diameter of the second shaft section 102 is larger than the diameter of the first shaft section 101. The crankshaft 1 has a shaft hole 103 along its axial direction. (See attached diagram) Figure 3 As shown, the centerline of the shaft hole 103 is parallel to but does not coincide with the centerline of the first shaft segment 101. The first shaft segment 101 is equivalent to an eccentric wheel. The centerline of the shaft hole 103 coincides with the centerline of the second shaft segment 102. A gap is provided between the first shaft segment 101 and the second shaft segment 102 to ensure that the parts mounted on the first shaft segment 101 and the parts mounted on the second shaft segment 102 do not interfere with each other. Motor shaft 2, see appendix. Figure 1 and attached Figure 3 As shown, motor shaft 2 is connected to motor body 3. Motor shaft 2 passes through crankshaft 1 via shaft hole 103, and motor shaft 2 and crankshaft 1 are fixedly connected. Crankshaft 1 rotates synchronously with motor shaft 2. Crank bracket 4, see attached... Figure 4 As shown, the crank bracket 4 is sleeved on the outside of the first shaft section 101, and the first shaft section 101 and the crank bracket 4 are connected by a bearing 5; the outer surface of the first shaft section 101 is fixedly connected to the inner ring of the bearing 5, and the inner surface of the crank bracket 4 is fixedly connected to the outer ring of the bearing 5; the diaphragm assembly 6 is disposed on the crank bracket 4; the balance sleeve 7 is sleeved on the second shaft section 102; and the counterweight 8 is detachably locked onto the balance sleeve 7.

[0039] Principle: After the motor is started, the motor shaft 2 rotates, which drives the crankshaft 1 to rotate synchronously. The connection structure between the first shaft section 101 and the motor shaft 2 is equivalent to an eccentric wheel structure. A bearing 5 is installed between the first shaft section 101 and the crank bracket 4. When the first shaft section 101 rotates with the motor shaft 2, the crank bracket 4 drives the diaphragm assembly 6 to reciprocate. The second shaft section 102 is coaxially and fixedly connected to the motor shaft 2. When the second shaft section 102 rotates with the motor shaft 2, the second shaft section 102 rotates together with the balance sleeve 7. The balance sleeve 7 rotates together with the counterweight 8 around the motor shaft 2, so that the movement of the counterweight 8 can counteract the centrifugal force generated by the eccentric structure of the crankshaft 1, thereby reducing the vibration amplitude. When the external load of the diaphragm pump changes, the operator can remove the counterweight 8 and replace it with a counterweight 8 of the corresponding weight to complete the manual adjustment of the dynamic balance. Different shapes, weights, or quantities of counterweights 8 can be pre-configured for easy replacement and adjustment by the operator.

[0040] The shape of the counterweight 8 is designed to avoid interference with installation and facilitate installation. As for the selection of the weight of the counterweight 8, it can be configured according to the load of the diaphragm pump. Through calculation, debugging and other related technical means by those skilled in the art, counterweights 8 corresponding to different loads can be configured to achieve the best dynamic balance of the diaphragm pump, so it will not be elaborated here.

[0041] See appendix Figure 3 and attached Figure 7 As shown, the crank bracket 4 consists of an integral ring 401 and a column 402. The column 402 is fixed to the radial outer surface of the ring 401, and the diaphragm assembly 6 is connected to the column 402. The crank bracket 4 has a portion of the ring 401 connected to the bearing 5, resulting in more uniform force distribution and a more stable structure. The crank bracket 4 also has a portion of the column 402 connected to the diaphragm assembly 6, making installation easier. The diaphragm assembly 6 includes a diaphragm 601 and a moving part 602. The lower end of the moving part 602 is securely connected to the inner hole of the nut 9. The moving part 602 is connected to the crank bracket 4 via the nut 9, improving the ease of connection between the moving part 602 and the crank bracket 4. The nut 9 is embedded in the crank bracket 4. Specifically, the nut 9 is embedded in the column 402. This nut 9 embedding structure facilitates disassembly and better restricts the circumferential freedom of the moving part 602. In some embodiments, the nut 9 employs a double nut 9 structure to improve the stability of the connection position, see patent document CN201606379U. The first shaft segment 101 is located on the side closer to the motor body 3, and the second shaft segment 102 is located on the side farther from the motor body 3. The second shaft segment 102 being located on the side farther from the motor body 3 facilitates the replacement and adjustment of the counterweight 8, making operation more convenient.

[0042] See appendix Figure 6As shown, the balance sleeve 7 is fixedly connected to the crankshaft 1 and the motor shaft 2 via a first locking member 10, which is a fastening screw. Using a fastening screw to fix the balance sleeve 7 and the crankshaft 1 together to the motor shaft 2 improves the consistency of movement among the balance sleeve 7, crankshaft 1, and motor shaft 2. The counterweight 8 is detachably connected to the balance sleeve 7 via a second locking member 11, which is a countersunk screw. Using a countersunk screw to connect the counterweight 8 to the balance sleeve 7 limits the outer surface of the counterweight 8, improving structural stability. The first locking member 10 and the second locking member 11 are respectively located on opposite radial sides of the balance sleeve 7. The relative positions of the first locking member 10 and the second locking member 11 ensure relatively stable radial force on the balance sleeve 7. Several evenly distributed through holes 12 are provided circumferentially on the body of the balance sleeve 7. The through holes 12 reduce the overall weight of the balance sleeve 7 and facilitate the installation of multiple counterweights 8.

[0043] See appendix Figure 1 As shown, it also includes a housing 13, on which mounting holes 14 and inspection ports 15 are provided. The diaphragm assembly 6 is disposed at the mounting holes 14, and the mounting holes 14 and inspection ports 15 are located on different sides. The housing 13 can protect the internal structure of the diaphragm pump, and the inspection port 15 facilitates the inspection and maintenance of the internal structure.

[0044] The adjustable dynamic balance diaphragm pump structure designed in this utility model allows for different configurations to be achieved by replacing the counterweights 8 with different loads when the external load of the diaphragm pump changes. This enables manual adjustment of the dynamic balance, allowing the inertial forces of the rotating parts to cancel each other out, thus achieving optimal dynamic balance for the diaphragm pump, reducing vibration amplitude, and extending the service life of other internal parts. Moreover, the overall structure is simple in design, has low production cost, good overall structural stability, low vibration of the diaphragm pump, and strong practicality, making it suitable for widespread application.

[0045] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An adjustable dynamically balanced diaphragm pump structure, characterized in that, include: A crankshaft (1) includes a first shaft segment (101) and a second shaft segment (102). The diameter of the second shaft segment (102) is larger than the diameter of the first shaft segment (101). The crankshaft (1) has a shaft hole (103) along its axial direction. The center line of the shaft hole (103) is parallel to and does not coincide with the center line of the first shaft segment (101). The center line of the shaft hole (103) coincides with the center line of the second shaft segment (102). Motor shaft (2), the motor shaft (2) is connected to the motor body (3), the motor shaft (2) passes through the crank shaft (1) through the shaft hole (103), and the motor shaft (2) and the crank shaft (1) are fixedly connected; A crank bracket (4) is sleeved on the outside of the first shaft segment (101), and the first shaft segment (101) and the crank bracket (4) are connected by a bearing (5). A diaphragm assembly (6) is disposed on the crank bracket (4); A balance sleeve (7) is fitted onto the second shaft segment (102); The counterweight (8) is detachably locked onto the balance sleeve (7).

2. The adjustable dynamic balance diaphragm pump structure according to claim 1, characterized in that: The crank bracket (4) is composed of an integral ring (401) and a column (402), the column (402) is fixed on the radial outer surface of the ring (401), and the diaphragm assembly (6) is connected to the column (402).

3. The adjustable dynamic balance diaphragm pump structure according to claim 1, characterized in that: The diaphragm assembly (6) includes a diaphragm sheet (601) and a moving part (602), the lower end of which is fastened to the inner hole of the nut (9).

4. The adjustable dynamic balance diaphragm pump structure according to claim 3, characterized in that: The nut (9) is embedded in the crank bracket (4).

5. The adjustable dynamic balance diaphragm pump structure according to claim 1, characterized in that: The first shaft segment (101) is located on the side close to the motor body (3), and the second shaft segment (102) is located on the side away from the motor body (3).

6. The adjustable dynamic balance diaphragm pump structure according to claim 1, characterized in that: The balance sleeve (7) is fixedly connected to the crankshaft (1) and the motor shaft (2) by a first locking member (10), and the first locking member (10) is a fastening screw.

7. The adjustable dynamic balance diaphragm pump structure according to claim 6, characterized in that: The counterweight (8) is detachably connected to the balance sleeve (7) via a second locking member (11), which is a countersunk screw.

8. The adjustable dynamic balance diaphragm pump structure according to claim 7, characterized in that: The first locking member (10) and the second locking member (11) are respectively disposed on opposite radial sides of the balance sleeve (7).

9. The adjustable dynamic balance diaphragm pump structure according to claim 1, characterized in that: The balancing sleeve (7) has several evenly distributed through holes (12) on its circumferential side.

10. The adjustable dynamic balance diaphragm pump structure according to claim 1, characterized in that: It also includes a housing (13) with a mounting hole (14) and an inspection port (15) on the housing (13), and the diaphragm assembly (6) is disposed at the mounting hole (14), with the mounting hole (14) and the inspection port (15) located on different sides.

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