Core pulling component of circulating water pump
By using a suspended structure to fix the guide vane and impeller shell in the core extraction component of the circulating water pump, the pump vibration problem caused by the shaking of the guide vane is solved and a more stable operation is achieved.
Patent Information
- Application Number
- CN202421800511.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The vane body of the existing circulating water pump shakes in the cylinder, causing the pump to vibrate.
By modifying the core extraction components of the circulating water pump, the suspension structure is adopted to fix the guide vane body and the impeller shell on the pump cover to reduce the impact of rotation torque on the guide vane body.
The vibration of the circulating water pump is effectively reduced, and by fixing the guide vane body and the impeller shell, it prevents it from rotating or moving up and down due to rotation torque.
Smart Images
Figure CN222924611U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of circulating water pumps, and in particular relates to a core-pulling component of a circulating water pump. Background Art
[0002] The circulating water pump is installed in the closed loop of the heating system or air conditioning water system. The circulating water pump does not lift the water to a high place, but circulates the water repeatedly in the system to overcome the resistance loss of the loop.
[0003] The original structure of the existing circulating water pump will cause the guide vane body to shake in the cylinder due to the corrosion of the guide vane body, resulting in increased vibration of the circulating pump. Utility Model Content
[0004] The utility model aims to provide a core-pulling component for a circulating water pump, so as to solve the problem that the guide vane body shakes in the cylinder body, which leads to increased vibration of the circulating pump, as mentioned in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a core-pulling component of a circulating water pump, comprising an outer cylinder with a pump cover installed on the top; a pump shaft with a pump cover upper cover installed on the top, which is placed in the outer cylinder in a suspended state as a whole. Except for the rotating part, the loads of other parts of the core-pulling component after the modification act on the pump cover, so the strength requirements of the pump cover are higher than those of the previous structural form. The pump cover needs to be strengthened during the modification, and it can be remade by adding a rib plate or increasing the thickness of the pump cover steel plate; since the core-pulling component is changed to a suspension structure as a whole, the shaft system will move upward accordingly after the suspension. Lifting, to prevent the top of the upper shaft from hitting the motor shaft head, the upper shaft should be shortened appropriately as needed when inspecting the pump shaft; an impeller is installed at the bottom end of the pump shaft; the top of the bell-shaped pipe is fixed to the bottom end of the outer cylinder by bolts, and the bottom end of the bell-shaped pipe is bent horizontally toward its inner side, and a seat block is installed on the bending part; the connecting piece, the cover is arranged on the outside of the impeller and is fixed to the outer side of the bottom end of the impeller; the bottom end of the connecting piece is on the inner side of the seat block and is radially constrained by the seat block; after the overall suspension, the impeller casing is no longer placed on the seat block, but the radial constraint is still retained, and the rib plate originally used for anti-rotation is no longer needed.
[0006] Preferably, the connecting piece covers a guide vane body arranged outside the impeller, and an impeller shell installed at the bottom end of the guide vane body, and the impeller shell is located inside the seat block; placement holes are opened at equal angles on the inner side surface of the seat block, and a ball is placed inside the placement hole, and a spring is arranged between the ball and the placement hole, and a limit ring is screwed into the inner side of the port of the placement hole, and the limit ring is against the side of the ball.
[0007] Preferably, the outer cylinder is further provided with an arc-shaped flow guide cover inside, and a water guide cone is provided below the flow guide cover, and the water guide cone is wound around the outside of the pump shaft.
[0008] Preferably, an inner cylinder is further installed between the fairing and the water guide cone, and a channel for liquid to flow is formed between the inner cylinder and the water guide cone.
[0009] Preferably, both the guide vane body and the bellmouth are made of stainless steel, and the guide vane body is fixed to the impeller housing by bolts.
[0010] Preferably, the inner side surface of the bottom end of the impeller housing is fixed to the outer side surface of the bottom end of the impeller by bolts, and the low blunt part of the impeller housing wraps around the outside of the impeller.
[0011] Preferably, the guide vane body, the pump shaft, the inner cylinder, the water guide cone, and the impeller are arranged coaxially.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0013] By locally increasing the fixed connection between the inner cylinder and the lower parts through the fairing, the impeller housing and the guide vane body, which were originally seated independently below, are suspended and fixed, thereby reducing the vibration of the circulating pump. The new structure suspends and fixes the guide vane body, which was originally placed at the bottom of the outer cylinder, on the pump cover through the connection and fixation of the cylinder and the flange. In this way, through bolt connection, the guide vane body and the impeller housing are fixed, and the guide vane body cannot rotate or move up and down due to the rotational torque. Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the present utility model;
[0015] Figure 2 is of the present utility model Figure 1 is an enlarged schematic diagram of area A in
[0016] Figure 3 is a schematic structural diagram of Comparative Example 1;
[0017] Figure 4 is of the present utility model Figure 3 is an enlarged schematic diagram of area B in
[0018] Figure 5 is of the present utility model Figure 2 is an enlarged schematic diagram of area C in.
[0019] In the figure:
[0020] 1. Fairing; 2. Outer cylinder; 3. Guide vane body; 4. Pump shaft; 5. Inner cylinder; 6. Water guide cone; 7. Impeller; 8. Bellmouth; 9. Impeller housing; 10. Seat block; 11. Stop rib plate; 12. Anti-rotation rib plate; 13. Limit ring; 14. Ball; 15. Placement hole; 16. Spring. Detailed Embodiments
[0021] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0022] Embodiment
[0023] Please refer to Figure 1 、 Figure 2 、 Figure 5 The present invention provides a technical solution: a core-pulling component of a circulating water pump, including
[0024] An outer cylinder 2 with a pump cover installed at the top;
[0025] A pump shaft 4 with an upper cover of the pump cover installed at the top, and the whole is suspended in the outer cylinder 2 in a hanging manner. In the reformed structure of the core-pulling component, except for the rotating part, the loads of other parts act on the pump cover. Therefore, the requirement for the strength of the pump cover is higher than that of the previous structural form. When reforming, the pump cover needs to be strengthened, which can be achieved by adding rib plates or increasing the thickness of the pump cover steel plate and remaking it; since the whole core-pulling component is changed to a suspended structure, the shafting will be lifted upwards accordingly after suspension. To prevent the top of the upper shaft from hitting the top of the motor shaft, the upper shaft is appropriately shortened as needed during the overhaul of the pump shaft; an impeller 7 is installed at the bottom end of the pump shaft 4;
[0026] A bellmouth pipe 8, the top of which is fixed to the bottom end of the outer cylinder 2 by bolts, and the bottom end of the bellmouth pipe 8 is horizontally bent towards its own inner side, and a seat block 10 is installed at its bent part;
[0027] A connecting piece, which covers the outside of the impeller 7 and is fixed to the outer side of the bottom end of the impeller 7; the bottom end of the connecting piece is inside the seat block 10 and is radially restricted by the seat block 10; after the whole is suspended, the impeller housing 9 is no longer placed on the seat block 10, but the radial restraint is still retained, and the original rib plates for preventing rotation are no longer needed.
[0028] In this embodiment, preferably, the connecting member includes a guide vane body 3 covering the outside of the impeller 7 and an impeller housing 9 installed at the bottom end of the guide vane body 3. The impeller housing 9 is inside the seat block 10. The inner side surface of the seat block 10 is provided with placement holes 15 at equal angles. A ball 14 is placed inside the placement hole 15. A spring 16 is arranged between the ball 14 and the placement hole 15. A limit ring 13 is screwed into the inner side of the port of the placement hole 15. The limit ring 13 abuts against the side of the ball 14. In the radial limit of the impeller housing 9 by the seat block 10, the friction between the two can be reduced by the ball 14 to achieve the purpose of reducing wear. At the same time, the setting of the spring 16 can ensure that the ball 14 is always in rolling contact with the impeller housing 9.
[0029] In this embodiment, preferably, a guide vane 1 with an arc-shaped structure is further arranged inside the outer cylinder 2. A water guide cone 6 is arranged below the guide vane 1. The water guide cone 6 is wound around the outside of the pump shaft 4.
[0030] In this embodiment, preferably, an inner cylinder 5 is further installed between the guide vane 1 and the water guide cone 6. A channel for liquid to flow through is formed between the inner cylinder 5 and the water guide cone 6. During installation, the guide vane 1 needs to be connected to the lower water guide cone 6, and the maximum lifting height is increased to 12.0 m. If the on-site conditions cannot be met, the method of repeated lifting can be used to avoid the maximum lifting height limit. Through repeated lifting, the maximum lifting height required for disassembly and assembly remains the original height of 8.5 m. After the transformation, the maximum lifting weight required for assembling the core-pulling component is increased to 17 tons, but this is still lower than the lifting weight of the pump body, meeting the current traveling crane configuration conditions on site.
[0031] In this embodiment, preferably, both the guide vane body 3 and the bellmouth 8 are made of stainless steel, and the guide vane body 3 and the impeller housing 9 are fixed by bolts.
[0032] In this embodiment, preferably, the inner side surface of the bottom end of the impeller housing 9 and the outer side surface of the bottom end of the impeller 7 are fixed by bolts, and the lower blunt part of the impeller housing 9 wraps around the outside of the impeller 7.
[0033] In this embodiment, preferably, the guide vane body 3, the pump shaft 4, the inner cylinder 5, the water guide cone 6, and the impeller 7 are arranged coaxially.
[0034] Comparative example
[0035] Please refer to Figure 2 and Figure 3 , in the original structure, an anti-rotation rib plate 12 was used to prevent the rotation of the guide vane body 3 and the impeller housing 9. During the startup process, due to the impact of water flow, the impact force of the anti-rotation rib plate 12 hitting the stop rib plate 11 was relatively large, resulting in the fracture of the stop rib plate 11 and the loss of the anti-rotation function.
[0036] Although embodiments of the present utility model have been shown and described (see the above detailed description), those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A core-pulling component of a circulating water pump, characterized in that: include The outer cylinder (2) has a pump cover mounted on the top; The pump shaft (4) has a pump cover upper cover installed on the top, and the whole is suspended in the outer cylinder (2); an impeller (7) is installed at the bottom end of the pump shaft (4); The top end of the trumpet pipe (8) is fixed to the bottom end of the outer cylinder (2) by bolts, and the bottom end of the trumpet pipe (8) is horizontally bent toward the inside of itself, and a seat block (10) is installed at the bent portion; The connecting piece is covered outside the impeller (7) and fixed to the outer side of the bottom end of the impeller (7); the bottom end of the connecting piece is located inside the seat block (10) and is radially constrained by the seat block (10).
2. The core-pulling component of a circulating water pump according to claim 1, characterized in that: The connecting piece covers a guide vane body (3) arranged outside the impeller (7), and an impeller housing (9) installed at the bottom end of the guide vane body (3), and the impeller housing (9) is located inside a seat block (10); the inner side surface of the seat block (10) is provided with placement holes (15) at equal angles, a ball (14) is placed inside the placement hole (15), a spring (16) is provided between the ball (14) and the placement hole (15), and a limit ring (13) is screwed into the inner side of the end of the placement hole (15), and the limit ring (13) abuts against the side of the ball (14).
3. The core-pulling component of a circulating water pump according to claim 1, characterized in that: A flow guide cover (1) with an arc-shaped structure is also arranged inside the outer cylinder (2), and a water guide cone (6) is arranged below the flow guide cover (1), and the water guide cone (6) is wound around the outside of the pump shaft (4).
4. The core-pulling component of a circulating water pump according to claim 3, characterized in that: An inner cylinder (5) is also installed between the deflector cover (1) and the water guide cone (6), and a channel for liquid circulation is formed between the inner cylinder (5) and the water guide cone (6).
5. The core-pulling component of a circulating water pump according to claim 2, characterized in that: The guide vane body (3) and the trumpet pipe (8) are both made of stainless steel, and the guide vane body (3) and the impeller housing (9) are fixed by bolts.
6. The core-pulling component of a circulating water pump according to claim 2, characterized in that: The inner side surface of the bottom end of the impeller housing (9) and the outer side surface of the bottom end of the impeller (7) are fixed by bolts, and the lower blunt half of the impeller housing (9) is wrapped around the outside of the impeller (7).
7. The core-pulling component of a circulating water pump according to claim 1, characterized in that: The pump shaft (4), the inner cylinder (5), the water guide cone (6) and the impeller (7) are arranged coaxially.