Energy-saving axial force balancing device
By designing the micro-contact state of the static ring in the axial force balance device, the problem of liquid leakage in the prior art is solved, and axial force balance and energy-saving effects are achieved.
Patent Information
- Application Number
- CN202421522322.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The existing axial force balance device has liquid leakage problems when balancing axial force, and the leakage volume can reach 10%-20%.
An energy-saving axial force balance device is designed, including a rotor, a sealing chamber, a moving ring and a static ring. The static ring is close to the end surface of the moving ring, and the pressure on the end surface and inner side of the moving ring is reduced, approaching the pressure on the inlet side of the rotor, thereby achieving axial force balance and reducing leakage.
By forming a micro-contact state, the axial force balance is achieved, and the amount of liquid leakage is reduced, achieving energy-saving effect.
Smart Images
Figure CN222746293U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of axial force balancing devices, in particular to an energy-saving axial force balancing device. Background Art
[0002] When the pump impeller is working, the inlet pressure is low and the outlet pressure increases. The pressure on the front and rear covers of the impeller from the outside of the mouth ring is balanced, and the pressure on the rear cover to the pump shaft side is distributed parabolically. The pressure on the rear cover on the inside of the mouth ring is greater than the inlet pressure, generating an axial force pointing to the inlet side. In order to balance the axial force, various methods are used, such as balancing holes, balancing drums, balancing plates, etc., all of which generate a pressure difference and balance the axial force by reducing the pressure at the rear, but the liquid leakage loss is very large (up to 10%-20%).
[0003] Therefore, it is urgently necessary to provide an axial balancing force device that can reduce liquid leakage. Utility Model Content
[0004] In order to solve the technical problems mentioned in the background technology, the utility model provides an energy-saving axial force balancing device.
[0005] The utility model provides an energy-saving axial force balancing device, comprising: a rotating wheel, which is sleeved on the motor rotating shaft of a pump body; and
[0006] A sealing chamber sleeved on the rear end of the runner; and
[0007] The dynamic ring and the static ring are arranged in the sealing chamber; wherein
[0008] The stationary ring is suitable for being in close contact with the end surface of the moving ring when the moving ring rotates following the rotating wheel, so as to form a micro-contact state, thereby achieving axial balance.
[0009] Furthermore, the front end of the moving ring is connected to the end of the rotating wheel;
[0010] The rear end of the dynamic ring is connected to the front end of the static ring; and
[0011] A groove for accommodating a sealing ring is provided on the front end contact surface of the dynamic ring.
[0012] Further, the front end of the static ring is connected to the rear end of the dynamic ring;
[0013] The end of the stationary ring is connected to a spring arranged in the sealing chamber.
[0014] Furthermore, the movable ring and the rotating wheel are connected by snap-fitting.
[0015] Furthermore, the outer diameter of the front end of the stationary ring is greater than the outer diameter of the rear end thereof; and
[0016] The outer diameter of the front end portion of the stationary ring is smaller than the outer diameter of the dynamic ring.
[0017] Furthermore, the area of the front end contact surface of the static ring is smaller than the area of the rear end contact surface of the dynamic ring.
[0018] Furthermore, a rotation gap is left between the front end surface of the sealing chamber and the rear end surface of the rotating wheel.
[0019] Furthermore, the end of the sealing chamber is in contact with the motor shaft; and an auxiliary sealing member is also provided in the sealing chamber.
[0020] The beneficial effect of the utility model is that the energy-saving axial force balancing device of the utility model includes a wheel sleeved on the motor shaft of the pump body and a sealing chamber sleeved on the rear end of the wheel, as well as a dynamic ring and a static ring arranged in the sealing chamber, wherein the static ring is suitable for being close to the end face of the dynamic ring when the dynamic ring rotates with the wheel to form a micro-contact state, thereby reducing the pressure on the end face and inner side of the dynamic ring to approach the pressure on the inlet side of the wheel, thereby balancing the axial force and reducing the leakage.
[0021] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.
[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 A schematic cross-sectional structure diagram of an energy-saving axial force balancing device according to some embodiments is shown.
[0025] In the figure:
[0026] Rotor 1, dynamic ring 2, sealing ring 21, static ring 3, front end 31, rear end 32, sealing chamber 4, auxiliary sealing member 5, motor shaft 6, spring 7, DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0028] like Figure 1 As shown, at least one embodiment provides an energy-saving axial force balancing device, comprising: a wheel 1, which is sleeved on the motor shaft 6 of the pump body; and a sealing chamber 4 sleeved on the rear end of the wheel 1; and a dynamic ring 2 and a static ring 3 arranged in the sealing chamber 4; wherein the static ring 3 is suitable for being close to the end face of the dynamic ring 2 when the dynamic ring 2 rotates with the wheel 1, so as to form a micro-contact state, thereby achieving axial balance.
[0029] In some embodiments, by controlling the size of the moving ring 2 and the static ring 3 arranged at the end of the impeller 1, the contact surface of the moving ring 2 and the static ring 3 is in a separated state, and is made to slightly contact with each other by a spring. At this time, micro-leakage is allowed, and the micro-leaked liquid flows back to the low-pressure side of the inlet through the reflux pipe, thereby reducing the pressure on the rear side of the impeller 1 and balancing the axial force of the pump. When the pump starts, the impeller 1 rotates with the motor shaft 6, and the pressure at the front and rear covers of the impeller 1 increases. The pressure on the inner side of the rear ring is higher than the pressure at the inlet of the impeller 1, forming an axial force pointing to the inlet of the impeller 1, and the moving ring 2 rotates with the impeller 1. The static ring 3 is pressed against the end face of the moving ring 2 due to the spring force, forming a micro-contact state, causing the pressure on the end face and inner side of the moving ring 2 to drop to approach the pressure on the inlet side of the impeller 1, so that the axial force is balanced and the leakage is reduced, thereby achieving energy-saving effect.
[0030] In some embodiments, the front end of the moving ring 2 is connected to the end of the rotating wheel 1, the end of the moving ring 2 is connected to the front end of the stationary ring 3, and the end of the stationary ring 3 is connected to the spring 7 arranged in the sealing chamber 4. Through the above connection, the moving ring 2 and the stationary ring 3 can be stably arranged in the sealing chamber 4, and a sealing ring 21 is placed in the groove opened on the front end contact surface of the moving ring 2, so as to ensure that there is no leakage at the connection between the moving ring 2 and the rotating wheel 1 and stabilize the axial force.
[0031] As an optional embodiment, the connection method between the moving ring 2 and the rotating wheel 1 includes but is not limited to snap connection.
[0032] In some embodiments, the outer diameter of the front end portion 31 of the stationary ring 3 is larger than the outer diameter of the rear end portion 32 thereof; and the outer diameter of the front end portion 31 of the stationary ring 3 is smaller than the outer diameter of the dynamic ring 2. Specifically, the rear end portion 32 of the stationary ring 3 has a smaller diameter, which facilitates the circumferential outer side wall of the rear end portion 32 of the stationary ring 3 to be attached to the inner side wall of the sealing chamber 4, and reduces the size of the stationary ring 3, thereby reducing the size of the axial force balancing device. At the same time, the outer diameter of the front end portion 31 of the stationary ring 3 is larger, so that the overall center of gravity of the stationary ring 3 is oriented toward the front end, thereby making the abutment of the stationary ring 3 against the dynamic ring 2 more stable.
[0033] In some embodiments, the area of the front end contact surface of the static ring 3 is smaller than the area of the end contact surface of the dynamic ring 2. This arrangement reduces the contact area between the dynamic ring 2 and the static ring 3 when the dynamic ring 2 rotates, thereby avoiding the influence of the rotational friction on the rotation of the rotating wheel 1. Similarly, a rotational gap is left between the front end surface of the sealing chamber 4 and the end surface of the rotating wheel 1, thereby further reducing the rotational friction on the rotating wheel 1.
[0034] In some embodiments, the end of the sealing chamber 4 is in contact with the motor shaft 6 ; and an auxiliary sealing member 5 is also provided in the sealing chamber 4 to ensure a good sealing effect in the entire sealing chamber 4 .
[0035] In summary, the energy-saving axial force balancing device of the utility model includes a wheel 1 sleeved on the motor shaft 6 of the pump body and a sealing chamber 4 sleeved on the rear end of the wheel 1, as well as a dynamic ring 2 and a static ring 3 arranged in the sealing chamber 4, wherein the static ring 3 is suitable for being close to the end face of the dynamic ring 2 when the dynamic ring 2 rotates with the wheel 1 to form a micro-contact state, thereby reducing the pressure on the end face and inner side of the dynamic ring 2 to approach the pressure on the inlet side of the wheel 1, thereby balancing the axial force and reducing the leakage.
[0036] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0038] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. With the above-mentioned ideal embodiments of the utility model as inspiration, through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the technical idea of the utility model. The technical scope of the utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. An energy-saving axial force balancing device, characterized in that: include: A runner, sleeved on the motor shaft of the pump body; and A sealing chamber sleeved on the rear end of the runner; as well as The dynamic ring and the static ring are arranged in the sealing chamber; wherein The stationary ring is suitable for being in close contact with the end surface of the moving ring when the moving ring rotates following the rotating wheel, so as to form a micro-contact state, thereby achieving axial balance.
2. The energy-saving axial force balancing device according to claim 1, characterized in that: The front end of the moving ring is connected to the end of the rotating wheel; The rear end of the dynamic ring is connected to the front end of the static ring; and A groove for accommodating a sealing ring is provided on the front end contact surface of the dynamic ring.
3. The energy-saving axial force balancing device according to claim 2, characterized in that: The front end of the static ring is connected to the rear end of the dynamic ring; The rear end of the stationary ring is connected to a spring arranged in the sealing chamber.
4. The energy-saving axial force balancing device according to claim 2, characterized in that: The connection mode between the moving ring and the rotating wheel is snap connection.
5. The energy-saving axial force balancing device according to claim 3, characterized in that: The outer diameter of the front end of the stationary ring is greater than the outer diameter of the rear end thereof; and The outer diameter of the front end portion of the stationary ring is smaller than the outer diameter of the dynamic ring.
6. The energy-saving axial force balancing device according to claim 5, characterized in that: The area of the front end contact surface of the static ring is smaller than the area of the rear end contact surface of the dynamic ring.
7. The energy-saving axial force balancing device according to claim 1, characterized in that: A rotation gap is reserved between the front end surface of the sealing chamber and the rear end surface of the rotating wheel.
8. The energy-saving axial force balancing device according to claim 1, characterized in that: The end of the sealing chamber abuts against the motor shaft; and An auxiliary sealing member is also arranged in the sealing chamber.