A single stage pipeline pump with power seal and integrated packing seal

Abstract

This utility model relates to a single-stage pipeline pump with a dynamic seal and an integrated packing seal. The single-stage pipeline pump includes: a foundation plate, a pump body, an impeller, a pump cover, a secondary impeller dynamic seal, a motor, a water-retaining ring, an integrated self-adjusting packing seal system, and an impeller fixing component. The entire single-stage pipeline pump is fixed on the foundation plate. The water-retaining ring is located on the pump shaft and above the integrated self-adjusting packing seal system. Both the secondary impeller dynamic seal and the integrated self-adjusting packing seal system are installed on the pump shaft, with the secondary impeller dynamic seal located between the integrated self-adjusting packing seal system and the impeller. This utility model uses a combination of a secondary impeller dynamic seal and an integrated self-adjusting packing seal system, solving the problems of existing mechanical seals, especially addressing the issues of high cost, complex external systems, high investment costs, and high maintenance costs associated with mechanical seals in conditions involving solid particulate impurities and corrosive environments.

Description

Technical Field

[0001] This utility model relates to a single-stage pipeline pump, specifically a single-stage pipeline pump that combines a dynamic seal with an auxiliary impeller and an integrated self-adjusting packing seal system. This solves the problems of existing mechanical seals, especially the high cost, complex external system, high investment cost, and high maintenance cost of mechanical seals in situations involving solid particles, impurities, and corrosive environments. Background Technology

[0002] A single-stage inline pump is a centrifugal pump that can be directly installed in a pipeline system. Its inlet and outlet are on the same horizontal line with the same diameter. The impeller is directly mounted on the extended shaft of the motor, resulting in a compact structure, small footprint, and low construction investment. It is widely used in building water supply, industrial processes, HVAC, and agricultural irrigation.

[0003] As the core equipment for fluid transportation in the system, the main shaft sealing performance of existing single-stage pipeline pumps directly affects the operating efficiency, reliability and maintenance costs of the equipment. In particular, the reliability of the seal is especially important in harsh working conditions such as those containing solid particulate impurities and corrosive substances.

[0004] Existing single-stage pipeline pump shaft seals use mechanical seals or traditional packing seals. Mechanical seals have complex structures, require high precision, and are expensive. Furthermore, mechanical seals fail more frequently or require expensive and complex external auxiliary systems to achieve sealing under conditions containing solid particulate impurities and corrosive environments.

[0005] Traditional packing seals achieve sealing by causing radial expansion of the packing through axial clamping force. Therefore, they require periodic maintenance and complex external filtration, flushing, and cooling systems. Furthermore, they are more prone to seal failure due to wear under conditions containing solid particulate impurities and corrosive environments.

[0006] Due to the difference in structural dimensions between mechanical seals and packing seals, existing mechanical seals and packing seals on pipeline pumps cannot achieve universality and interchangeability of interface dimensions. Utility Model Content

[0007] To address the aforementioned problems, the main objective of this utility model is to provide a single-stage pipeline pump that combines a dynamic seal with an auxiliary impeller seal and an integrated self-adjusting packing seal system. This solves the problems of existing mechanical seals, particularly addressing the issues of high cost, complex external systems, high investment costs, and high maintenance costs associated with mechanical seals in applications involving solid particles, impurities, and corrosive environments.

[0008] This utility model solves the above-mentioned technical problems through the following technical solution: a single-stage pipeline pump with a dynamic seal and an integrated packing seal, the single-stage pipeline pump with a dynamic seal and an integrated packing seal comprising: a foundation plate, a pump body, an impeller, a pump cover, an auxiliary impeller dynamic seal, a motor, a water baffle ring, an integrated self-adjusting packing seal system, and an impeller fixing component; the entire single-stage pipeline pump is fixed on the foundation plate, the pump cover is fixed on the pump body, the impeller fixing component fixes the impeller on the pump shaft, the water baffle ring is located on the pump shaft and above the integrated self-adjusting packing seal system, the auxiliary impeller dynamic seal and the integrated self-adjusting packing seal system are both installed on the pump shaft, and the auxiliary impeller dynamic seal is located between the integrated self-adjusting packing seal system and the impeller.

[0009] In a specific embodiment of this utility model, the auxiliary impeller dynamic seal includes auxiliary impeller blades and an auxiliary impeller cover plate; the auxiliary impeller blades include several blades, which are evenly distributed on the auxiliary impeller cover plate, and the shape of the auxiliary impeller blades is spiral centrifugal, and the auxiliary impeller cover plate gradually slopes from the hub to the edge of the cover plate.

[0010] In a specific embodiment of this utility model, there are 4-8 secondary impeller blades.

[0011] In a specific embodiment of this utility model, the secondary impeller blades and the secondary impeller cover plate are cast as one piece.

[0012] In a specific embodiment of this utility model, the integrated self-adjusting packing seal system includes a sealing body, a retaining ring, a wave spring, a packing gland, a packing ring, a bushing, and bolts; the bushing is fitted onto the pump shaft, and an annular cavity is provided between the bushing and the sealing body. The packing ring, packing gland, wave spring, and retaining ring are arranged sequentially from bottom to top in the annular cavity, and the sealing body 801 is fixed to the pump cover by bolts.

[0013] In a specific embodiment of this utility model, the integrated self-adjusting packing seal system also includes two O-rings, one of which is located between the bushing and the pump shaft, and the other is located between the seal body and the pump cover.

[0014] In a specific embodiment of this utility model, the impeller fixing component is a bolt.

[0015] The significant advantages of this invention are as follows: This invention provides a single-stage pipeline pump with both dynamic sealing and integrated packing seal. The operating seal utilizes a secondary impeller dynamic seal, while the shutdown seal employs an integrated self-adjusting packing seal system. This combination solves the problems associated with existing mechanical seals, particularly addressing the issues of high cost, complex external systems, high investment costs, and high maintenance costs associated with mechanical seals in environments with solid particulate impurities and corrosive conditions.

[0016] This invention employs a self-adjusting packing seal system composed of packing and wave springs, achieving dynamic balance of sealing pressure, significantly improving reliability and service life. It features a simple structure, convenient manufacturing, and eliminates the need for periodic manual adjustment of the tightening force. It solves the sealing problem of pipeline pumps under harsh conditions containing solid particulate impurities and corrosive environments.

[0017] This utility model adopts an integrated self-adjusting packing sealing system. The interface size with the pump cover and the design of the pump cover are designed according to existing general standards. This solves the problems of existing solutions, which mostly adopt two independent sets of pump covers and sealing cavities, resulting in high investment costs, high factory and customer inventory and management costs, poor maintenance flexibility, and high costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2-1 This is a front view of the auxiliary impeller dynamic seal.

[0020] Figure 2-2 for Figure 2-1 Left sectional view.

[0021] Figure 3 This is a schematic diagram of an integrated self-adjusting packing sealing system.

[0022] The following are the names corresponding to the reference numerals in this utility model:

[0023] 1. Foundation base plate; 2. Pump body; 3. Impeller; 4. Pump cover; 5. Auxiliary impeller dynamic seal; 6. Motor; 7. Water baffle ring; 8. Integrated self-adjusting packing seal system; 9. Impeller fixing components; 10. Pump shaft; 501. Auxiliary impeller blades; 502. Auxiliary impeller cover plate; 801. Sealing body; 802. Snap ring; 803. Wave spring; 804. Packing ring; 805. Shaft sleeve; 806. Bolt; 807. "O" ring; 808. Detailed Implementation

[0024] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2-1 This is the front view of the auxiliary impeller dynamic seal. Figure 2-2 for Figure 2-1 Left sectional view, Figure 3The above figure shows a schematic diagram of the integrated self-adjusting packing seal system: This utility model provides a single-stage pipeline pump with a dynamic seal and an integrated packing seal. The single-stage pipeline pump with a dynamic seal and an integrated packing seal includes: a foundation plate 1, a pump body 2, an impeller 3, a pump cover 4, an auxiliary impeller dynamic seal 5, a motor 6, a water baffle ring 7, an integrated self-adjusting packing seal system 8, and an impeller fixing component 9. The entire single-stage pipeline pump is fixed on the foundation plate 1, the pump cover 4 is fixed on the pump body 2, the impeller fixing component 9 fixes the impeller 3 on the pump shaft 10, the water baffle ring 7 is located on the pump shaft and above the integrated self-adjusting packing seal system 8, the auxiliary impeller dynamic seal 5 and the integrated self-adjusting packing seal system 8 are both installed on the pump shaft 10, and the auxiliary impeller dynamic seal 5 is located between the integrated self-adjusting packing seal system 8 and the impeller 3. The impeller fixing component 9 of this utility model can be a bolt.

[0026] The auxiliary impeller dynamic seal 5 of this utility model includes auxiliary impeller blades 501 and an auxiliary impeller cover plate 502. The auxiliary impeller blades 501 consist of several pieces, evenly distributed on the auxiliary impeller cover plate 502. The auxiliary impeller blades 501 are spiral-shaped centrifugal. The auxiliary impeller cover plate 502 gradually slopes from the hub to the edge. Under the action of centrifugal force, the liquid and its accompanying particulate impurities move to the edge of the auxiliary impeller cover plate 502. Combined with the inclined gravity of the cover plate, this accelerates the discharge of liquid and particles, improving the sealing performance.

[0027] The auxiliary impeller blades 501 of this invention number 4-8, with 6 shown in the illustration. The auxiliary impeller blades 501 and the auxiliary impeller cover plate 502 of this invention are cast as a single unit.

[0028] This utility model discloses an integrated self-adjusting packing seal system 8, comprising a sealing body 801, a retaining ring 802, a wave spring 803, packing 804, a packing ring 805, a shaft sleeve 806, and bolts 807. The shaft sleeve 806 is fitted onto the pump shaft, and an annular cavity is provided between the shaft sleeve 806 and the sealing body 801. Within the annular cavity, the packing ring 805, packing 804, wave spring 803, and retaining ring 802 are arranged sequentially from bottom to top. The sealing body 801 is fixed to the pump cover 4 by bolts 807. The wave spring (803) automatically adjusts its spring force according to changes in system pressure. Its simple structure facilitates design and procurement, and it exhibits excellent dynamic tracking characteristics, achieving dynamic balance of sealing pressure, significantly improving reliability and service life, and avoiding the need for periodic manual adjustment of the tightening force. This solves the sealing problem of pipeline pumps under harsh conditions containing solid particulate impurities and corrosive environments.

[0029] The integrated self-adjusting packing seal system 8 of this utility model also includes two O-rings 808, one of which is located between the bushing 806 and the pump shaft, and the other is located between the sealing body 801 and the pump cover 4.

[0030] This utility model of auxiliary impeller dynamic seal uses the centrifugal pressure field generated by the rotation of the auxiliary impeller to counteract the leakage pressure of the medium. It is a non-contact, zero-leakage fluid dynamic sealing system with simple structure, good sealing effect, strong maintenance-free performance, and long sealing life.

[0031] This invention employs a secondary impeller dynamic seal for operation and an integrated self-adjusting packing seal system for shutdown sealing. The combination of these two technologies solves the problems associated with existing mechanical seals, particularly addressing the issues of high cost, complex external systems, high investment costs, and high maintenance costs associated with mechanical seals in environments with solid particulate impurities and corrosive conditions.

[0032] This invention employs a self-adjusting packing seal system composed of packing and wave springs, achieving dynamic balance of sealing pressure, significantly improving reliability and service life. It features a simple structure, convenient manufacturing, and eliminates the need for periodic manual adjustment of the tightening force. It solves the sealing problem of pipeline pumps under harsh conditions containing solid particulate impurities and corrosive environments.

[0033] This utility model adopts an integrated self-adjusting packing sealing system. The interface size with the pump cover and the design of the pump cover are designed according to existing general standards. This solves the problems of existing solutions, which mostly adopt two independent sets of pump covers and sealing cavities, resulting in high investment costs, high factory and customer inventory and management costs, poor maintenance flexibility, and high costs.

[0034] This utility model combines a secondary impeller dynamic seal with an integrated self-adjusting packing seal system. It features a simple structure, strong adaptability, and can meet various operating conditions, especially under conditions involving solid particulate impurities and corrosive environments. It achieves superior sealing performance with low investment. It solves the problems of high cost, complex external systems, high investment costs, and high maintenance costs associated with existing mechanical seals, and particularly addresses the sealing challenges of pipeline pumps in harsh conditions containing solid particulate impurities and corrosive environments.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A single-stage pipeline pump with a dynamic seal and an integrated packing seal, characterized in that: The single-stage pipeline pump with dynamic seal and integrated packing seal includes: a foundation plate, a pump body, an impeller, a pump cover, an auxiliary impeller dynamic seal, a motor, a water baffle ring, an integrated self-adjusting packing seal system, and an impeller fixing component. The entire single-stage pipeline pump is fixed on the foundation plate, the pump cover is fixed on the pump body, the impeller fixing component fixes the impeller to the pump shaft, the water baffle ring is located on the pump shaft and above the integrated self-adjusting packing seal system, the auxiliary impeller dynamic seal and the integrated self-adjusting packing seal system are both installed on the pump shaft, and the auxiliary impeller dynamic seal is located between the integrated self-adjusting packing seal system and the impeller.

2. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The auxiliary impeller dynamic seal includes auxiliary impeller blades and an auxiliary impeller cover plate. The auxiliary impeller blades consist of several blades, which are evenly distributed on the auxiliary impeller cover plate. The shape of the auxiliary impeller blades is spiral centrifugal. The auxiliary impeller cover plate gradually slopes from the hub to the edge of the cover plate.

3. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 2, characterized in that: The secondary impeller has 4-8 blades.

4. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The secondary impeller blades and the secondary impeller cover plate are cast as one piece.

5. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The integrated self-adjusting packing seal system includes a sealing body, a retaining ring, a wave spring, packing, a packing ring, a shaft sleeve, and bolts. The shaft sleeve is fitted onto the pump shaft, and an annular cavity is provided between the shaft sleeve and the sealing body. The packing ring, packing, wave spring, and retaining ring are arranged sequentially from bottom to top in the annular cavity. The sealing body is fixed to the pump cover with bolts.

6. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 5, characterized in that: The integrated self-adjusting packing seal system also includes two O-rings, one located between the bushing and the pump shaft, and the other located between the seal body and the pump cover.

7. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The impeller is fixed by bolts.

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