Water pump structure

Abstract

The invention discloses a water pump structure, belongs to the technical field of water pumps, and aims to solve the problem that an oil chamber is arranged between a pump head of an existing water pump and a motor chamber, and the motor chamber needs to be cooled additionally. Comprising a lower end cover, a mounting cylinder is arranged on the lower end cover, a first bearing body and a first outer mechanical seal are coaxially connected to form a sealed bearing, and the side, away from a motor cavity, of an outer ring of a second bearing body is connected with a double-end-face mechanical seal to form a combined seal. Or at least two groups of sealing bearings are arranged in the mounting cylinder, or at least one group of combined seal is arranged in the mounting cylinder, and an oil chamber is formed in the mounting cylinder. Only one lower end cover is reserved between the pump head and the motor cylinder, pumped media can conduct heat through the lower end cover to cool the motor cavity, the structure between the pump head and the motor cylinder is simplified, the size of the pump body is shortened, the manufacturing cost is reduced, water leakage points are reduced, the structure is compact, and the sealing effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of water pumps, and in particular relates to a water pump structure. Background Art

[0002] Submersible pumps are important equipment for deep well water extraction. When in use, the entire unit submerges in water to extract groundwater to the surface. They are widely used in many scenarios such as domestic water use, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading, fountain landscaping, etc.

[0003] In existing submersible pumps, a partition and a lower end cover are generally provided between the motor and the pump head. Bearings for supporting the rotation of the motor shaft and a mechanical seal for ensuring the rotational seal between the motor shaft and the partition are respectively provided at both ends of the partition. The bearings and the mechanical seal are separated. A sealing ring is also required on the lower end cover to ensure the rotational seal between the lower end cover and the motor shaft, so that an insulating oil chamber is formed between the lower end cover and the partition. For example, Chinese utility model patent No. CN2207463Y discloses a submersible pump with such a structure.

[0004] Since an oil chamber is provided between the pump head and the motor chamber, the temperature of the medium pumped by the submersible pump cannot be transmitted to the motor chamber, and a structure for cooling the motor chamber is required. Therefore, the submersible pump casing structure of this structure is complex, difficult to produce, and has high manufacturing costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a water pump structure to solve the problem that an oil chamber is provided between the pump head and the motor chamber of the existing water pump, and the motor chamber needs to be cooled separately. The technical solution adopted by the present invention is as follows:

[0006] A water pump structure includes a pump body, the pump body including a motor barrel, a pump head and a water inlet seat connected in sequence, the pump head and the motor barrel being separated by a lower end cover, the water outlet being connected to one side of the pump head, the upper end cover sealing the top of the motor barrel, the upper end of the rotating shaft being rotatably engaged with the upper end cover, the lower end of the rotating shaft passing through the lower end cover and being connected to an impeller disposed in the pump head, the rotor being sleeved on the rotating shaft, the stator being provided on the inner wall of the motor barrel, the rotor and the stator being rotatably engaged in an inner and outer sleeve;

[0007] A mounting cylinder is provided on the lower end cover, and a single-end mechanical seal in which the static ring and the dynamic ring are arranged from near to far relative to the motor cylinder is defined as an external mechanical seal. The first bearing body is coaxially connected to the first external mechanical seal to form a sealed bearing, and the outer ring of the second bearing body is connected to the double-end mechanical seal on the side away from the motor chamber to form a combined seal. At least one group of sealed bearings and one group of bearingless seals are provided in the mounting cylinder. The bearingless seal is one of an external mechanical seal, an oil seal or a sealing ring. An oil chamber is formed between the sealed bearing and the adjacent bearingless seal, or at least two groups of sealed bearings are provided in the mounting cylinder, and an oil chamber is formed between the two adjacent groups of sealed bearings, or at least one group of combined seals is provided in the mounting cylinder, and an oil chamber is formed between the two ends of the double-end mechanical seal. The rotating shaft and the mounting cylinder are rotatably matched through the first bearing body or the second bearing body, and the rotating shaft and the mounting cylinder are rotationally sealed through at least two first external mechanical seals, or the rotating shaft and the mounting cylinder are rotationally sealed through the first external mechanical seal and the bearingless seal, or the rotating shaft and the mounting cylinder are rotationally sealed through at least one group of double-end mechanical seals.

[0008] Furthermore, the first external mechanical seal includes a first dynamic ring and a first static ring, the first static ring is integrally formed with the outer ring of the first bearing body or is separately connected, and the first dynamic ring and the first static ring are in rotational sealing cooperation;

[0009] The double-end mechanical seal includes two second stationary rings and two second dynamic rings. The second stationary ring at one end is integrally formed with the outer ring of the second bearing body or is sealed in a split manner. The second stationary ring at the other end is sealed and connected to the inner circumference of the mounting cylinder. The two second stationary rings and the two second dynamic rings rotate and seal in a one-to-one correspondence, and an oil chamber is formed between the two second stationary rings.

[0010] Furthermore, the upper end cover and the motor barrel are integrally formed or separately connected.

[0011] Furthermore, the lower end cover and the motor barrel are integrally formed or separately connected.

[0012] Furthermore, the lower end cover and the pump head are integrally formed or separately connected.

[0013] Furthermore, the motor barrel and the pump head may be integrally formed or separately connected.

[0014] Furthermore, a water outlet pipe is integrally formed on one side of the motor barrel, and the water outlet is connected to the pump head through the water outlet pipe. When the motor barrel and the pump head are integrally formed, the water outlet pipe and the pump head are integrally formed. When the motor barrel and the pump head are separately connected, the water outlet pipe and the pump head are separately connected.

[0015] Furthermore, when the motor barrel and the pump head are integrally formed, the lower end cover and the motor barrel are integrally formed or separately connected.

[0016] Furthermore, a pump cap is provided on the top of the motor barrel.

[0017] Furthermore, a capsule storage tube is provided on one side of the motor tube, and an adjustment capsule is provided in the capsule storage tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The connection between the mounting barrel and the rotating shaft of the present invention can be used between the pump head and the motor barrel of a submersible pump or a land-based pump. For example, in the submersible pump shown in the figure, and the land-based pump shown in the figure, the end cap is connected to the pump body, enclosing the stator and rotor within the sealed motor barrel. The lower end of the rotating shaft passes through a set of sealed bearings and a set of bearingless seals and is connected to the impeller. Alternatively, the lower end of the rotating shaft passes through two sets of sealed bearings, a set of combined seals, or multiple seals, thereby achieving excellent sealing. Because the present invention employs sealed bearings or combined seals within the mounting barrel, an oil chamber is formed within the pump body. This eliminates the need for a partition between the pump head and the motor barrel, as well as the oil chamber between the lower end cap and the partition. Only the lower end cap remains between the pump head and the motor barrel, allowing heat conduction from the pumped medium through the lower end cap to cool the motor chamber. This greatly simplifies the structure between the pump head and the motor barrel, shortens the size of the pump body, reduces manufacturing costs, and reduces leaks. The resulting compact structure, excellent sealing, and wide range of applications are possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a mounting cylinder with a sealed bearing at the upper end and an oil seal at the lower end;

[0021] Figure 2 This is a schematic diagram of the structure of the combined seal installed in the cylinder;

[0022] Figure 3 This is a schematic diagram of the structure in which a third external mechanical seal is provided at the upper end of the mounting cylinder and a sealed bearing is provided at the lower end;

[0023] Figure 4 This is a schematic diagram of the structure in which two sets of sealed bearings are installed in the mounting cylinder;

[0024] Figure 5 It is a structural diagram of a sealed bearing;

[0025] Figure 6 This is a schematic diagram of the second structure of the sealed bearing;

[0026] Figure 7 This is a schematic diagram of the third structure of a sealed bearing;

[0027] Figure 8 This is the fourth structural diagram of the sealed bearing;

[0028] Figure 9 This is the fifth structural diagram of the sealed bearing;

[0029] Figure 10 It is a structural diagram of the combined seal;

[0030] Figure 11 This is a schematic diagram of the structure in which the upper end cover and the motor barrel are integrally formed;

[0031] Figure 12 This is a structural diagram of the lower end cover and the pump head being integrally formed;

[0032] Figure 13 This is a schematic diagram of the structure in which the motor cylinder is separately connected to the lower end cover and an adjustment capsule is provided;

[0033] Figure 14 This is a structural diagram of the motor barrel and the lower end cover being integrally formed and provided with an adjustment capsule;

[0034] Figure 15 This is a schematic diagram of the structure in which the motor barrel, lower end cover and pump head are integrally formed;

[0035] Figure 16 This is a structural diagram of the motor barrel and pump head being integrally formed and separately connected to the lower end cover;

[0036] Figure 17 This is a structural diagram in which the water outlet pipe and the motor barrel are integrally formed and separately connected to the pump head;

[0037] Figure 18 This is a structural diagram of the pump head and the water inlet seat being integrally formed;

[0038] Figure 19 This is a structural diagram in which the water outlet pipe is integrally formed with the motor barrel and the pump head;

[0039] Figure 20 This is a structural diagram in which the motor barrel and the water outlet pipe are integrally formed and separately connected to the lower end cover.

[0040] In the figure, 1. End cover, 2. Mounting cylinder, 3. Rotating shaft, 4. Oil filler thread, 5. Sealed bearing, 6. Bearingless seal, 7. Oil chamber, 8. Combined seal, 9. First bearing body, 10. Sealing gasket, 11. First rotating ring, 12. Rotating ring seat, 13. Spring, 14. Spring seat, 15. First stationary ring, 16. Sealing ring, 17. Retaining gasket, 18. Annular seat, 19. Second bearing body, 20. Second stationary ring, 21. Second rotating ring, 22. Impeller, 23. Pump body, 24. Stator, 25. Rotor, 26. Reservoir, 27. Adjusting bladder, 28. Pump head, 29. Water inlet seat, 30. Water outlet pipe, 31. Water outlet, 32. Upper end cover, 33. Pump cap. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0042] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as bolt connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a bolted connection is selected for a detachable connection.

[0043] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are provided to explain the present invention, but the present invention is not limited to the following embodiments.

[0044] Example 1: Figures 1-20 As shown, a water pump structure includes a pump body, which includes a motor barrel 23, a pump head 28 and a water inlet seat 29 connected in sequence. The pump head 28 and the motor barrel 23 are separated by a lower end cover 1. The water outlet 31 is connected to one side of the pump head 28. The upper end cover 32 blocks the top of the motor barrel 23. The upper end of the rotating shaft 3 is rotatably engaged with the upper end cover 32. The lower end of the rotating shaft 3 passes through the lower end cover 1 and is connected to the impeller 22 provided in the pump head 28. The rotor 25 is sleeved on the rotating shaft 3. The stator 24 is provided on the inner wall of the motor barrel 23. The rotor 25 and the stator 24 are rotatably engaged with each other inside and outside.

[0045] A mounting cylinder 2 is provided on the lower end cover 1, and a single-end mechanical seal in which the static ring and the dynamic ring are arranged from near to far relative to the motor cylinder 23 is defined as an external mechanical seal. The first bearing body 9 is coaxially connected to the first external mechanical seal to form a sealed bearing 5. The outer ring of the second bearing body 19 is connected to the double-end mechanical seal on the side away from the motor chamber to form a combined seal 8. At least one set of sealed bearings 5 ​​and one set of bearingless seals 6 are provided in the mounting cylinder 2. The bearingless seals 6 are one of an external mechanical seal, an oil seal or a sealing ring. An oil chamber 7 is formed between the sealed bearing 5 and the adjacent bearingless seal 6, or At least two groups of sealed bearings 5 ​​are arranged in the mounting cylinder 2, and an oil chamber 7 is formed between the two adjacent groups of sealed bearings 5, or at least one group of combined seals 8 is arranged in the mounting cylinder 2, and an oil chamber 7 is formed between the two ends of the double-end mechanical seal, the rotating shaft 3 and the mounting cylinder 2 are rotationally matched through the first bearing body 9 or the second bearing body 19, and the rotating shaft 3 and the mounting cylinder 2 are rotationally sealed through at least two first external mechanical seals, or the rotating shaft 3 and the mounting cylinder 2 are rotationally sealed through the first external mechanical seal and the bearingless seal 6, or the rotating shaft 3 and the mounting cylinder 2 are rotationally sealed through at least one group of double-end mechanical seals.

[0046] Figures 1-4 Four types of connection between the mounting cylinder 2 and the rotating shaft 3 are shown respectively. Specifically, Figure 1 The upper end of the middle mounting tube 2 is provided with a sealing bearing 5, and the lower end is provided with a skeleton oil seal. Figure 2 A combined seal 8 is provided in the middle mounting cylinder 2. Figure 3 The upper end of the middle mounting cylinder 2 is provided with a third external mechanical seal and the lower end is provided with a sealing bearing 5. Figure 4 Two sets of sealed bearings 5 ​​are arranged in the middle mounting tube 2. In fact, under the condition that the size allows, multiple seals can be arranged in the mounting tube 2, and as long as the multiple seals include any one of the above three sealing forms, a good sealing effect can be achieved.

[0047] For the purpose of distinction, the single-end mechanical seals that are arranged with the static ring and the dynamic ring from far to near relative to the motor chamber are called internal mechanical seals. Due to the centrifugal force, the liquid on the static ring side will seep out from the gap between the static ring and the dynamic ring and flow to the dynamic ring side. That is, if an external mechanical seal is set on the end cover between the motor and the impeller, the insulating oil on the motor side will leak to the impeller side. If an internal mechanical seal is set on the end cover between the motor and the impeller, the pumping medium on the impeller side will leak into the motor chamber, causing damage to the motor. In the prior art, there is often a structure with only one internal mechanical seal between the motor and the impeller. This application discovered the difference between the two installation methods when the mechanical seal is used on the water pump, which laid the foundation for the subsequent pump body to eliminate the partition and the oil chamber between the lower end cover and the partition.

[0048] In the prior art, a water pump typically has a lower end cover and a partition between the motor and the impeller. Furthermore, an oil chamber must be formed between the end cover and the partition to ensure sealing and prevent the pumped medium from penetrating deeply into the motor chamber. This results in a longer pump body.

[0049] The connection between the mounting cylinder 2 and the rotating shaft 3 of the present invention can be used between the pump head 28 and the motor cylinder 23 of a submersible pump or a land pump, such as Figures 11-16 The submersible pump shown, and Figures 17-20 In the road pump shown, the end cover 1 is connected to the pump body, and the stator 24 and the rotor 25 are sealed in the closed motor cylinder 28. The lower end of the rotating shaft 3 passes through a set of sealed bearings 5 ​​and a set of bearingless seals 6 and is connected to the impeller 22. Alternatively, the lower end of the rotating shaft 3 passes through two sets of sealed bearings 5, or the lower end of the rotating shaft 3 passes through a set of combined seals 8, or the lower end of the rotating shaft 3 passes through multiple seals to achieve a good sealing effect.

[0050] Because the present invention employs a sealed bearing 5 or combined seal 8 disposed within the mounting barrel 2, an oil chamber 7 is formed within the pump body within the mounting barrel 2. Consequently, the partition between the pump head 28 and the motor barrel 23, as well as the oil chamber between the lower end cover and the partition, can be eliminated. This leaves only the lower end cover 1 between the pump head 28 and the motor barrel 23. The pumped medium can be cooled by heat conduction through the lower end cover 1, thereby significantly simplifying the structure between the pump head 28 and the motor barrel 23, shortening the pump body, reducing manufacturing costs, and reducing leak points. The result is a compact structure, excellent sealing, and a wide range of applications.

[0051] The first bearing body 9 or the second bearing body 19 can achieve axial limitation with respect to the mounting tube 2 through a hole elastic retaining ring or an annular step structure provided on the inner wall of the mounting tube 2, or can achieve axial limitation with respect to the rotating shaft 3 through a shaft elastic retaining ring or a cylindrical pin.

[0052] The present invention fixes the first external mechanical seal on the first bearing body 9, combines the bearing and the external mechanical seal into one, which is "self-sealing", and changes the installation structure and sealing form of the existing seals and bearings. In order to achieve a better sealing effect, multiple groups of seals can be arranged at intervals in the installation cylinder 2, and only one end cover is required to install multiple sets of external mechanical seals or combined seals, which solves the problem of only installing one set of internal mechanical seals on one end cover of the existing water pump. The number of external mechanical seals installed in the present invention is not limited by the number of end covers, and solves the problem of setting both a partition and a lower end cover to install seals separately to form an oil chamber, and the problem of only being able to install one set of internal mechanical seals on one end cover. It can provide support for the rotating shaft 3 of the motor and realize the rotation seal of the rotating shaft 3.

[0053] Example 2: This embodiment is described in conjunction with Example 1. Figures 5-10As shown, the first external mechanical seal includes a first dynamic ring 11 and a first static ring 15. The first static ring 15 is integrally formed with the outer ring of the first bearing body 9 or is separately connected. The first dynamic ring 11 and the first static ring 15 rotate and seal together.

[0054] The double-end mechanical seal includes two second stationary rings 20 and two second dynamic rings 21. The second stationary ring 20 at one end is integrally formed with the outer ring of the second bearing body 19 or is sealed in a split manner. The second stationary ring 20 at the other end is sealed and connected to the inner periphery of the mounting tube 2. The two second stationary rings 20 and the two second dynamic rings 21 are rotated and sealed in a one-to-one manner, and an oil chamber 7 is formed between the two second stationary rings 20.

[0055] The first external mechanical seal also includes a dynamic ring seat 12, a spring 13 and a spring seat 14. The first static ring 15 and the outer ring of the first bearing body 9 can be integrally formed or separately sealed. The first dynamic ring 11 is arranged at one end of the dynamic ring seat 12. The first dynamic ring 11 and the first static ring 15 are rotated and sealed. The first dynamic ring 11 and the dynamic ring seat 12 are connected by a sealing ring 16. The other end of the dynamic ring seat 12 is against the spring seat 14 through the spring 13.

[0056] Figure 8 In the embodiment, the first stationary ring 15 is integrally formed with the outer ring of the first bearing body 9. The spring seat 14 is sleeved on the rotating shaft 3, and the axial limitation of the spring seat 14 and the rotating shaft 3 can be achieved by a cylindrical pin or a shaft elastic circlip.

[0057] The first bearing body 9 of this structure can be made of materials such as steel, titanium alloy or ceramic, and the first static ring 15 can be directly made into one piece with the outer ring of the first bearing body 9. In this way, the sealing and fixing problems between the first bearing body 9 and the first static ring 15 can be solved at the same time. The first dynamic ring 11 is sleeved on the rotating shaft 3 so that it rotates together with the rotating shaft 3, and the first dynamic ring 11 and the rotating shaft 3 are sealed by the sealing ring 16. Then, the first dynamic ring 11 and the first static ring 15 are rotated and sealed, so that one end of the oil chamber 7 can be sealed by the sealing bearing 5.

[0058] Figure 5 In the embodiment, the first stationary ring 15 and the outer ring of the first bearing body 9 are separately sealed against each other via a sealing gasket 10. The first stationary ring 15 comprises a static grinding ring and a sealing gasket 10. The sealing gasket 10 is a rubber component that covers one end and the outer periphery of the static grinding ring. When the first stationary ring 15 abuts against the first bearing body 9, it is sealed by the sealing gasket 10. The outer periphery of the static grinding ring is also sealed against the inner wall of the mounting tube 2 via the sealing gasket 10.

[0059] like Figure 7As shown, an annular seat 18 can be provided on the outer ring of the first bearing body 1. The sealing stationary ring 7 is disposed within the annular seat 18. The first stationary ring 15 and the annular seat 18 are sealed against each other via a sealing gasket 10. The annular seat 18 is provided on the outer ring of the first bearing body 9 to reliably secure the first external mechanical seal. The static grinding ring and the annular seat 18 are sealed together via the sealing gasket 10.

[0060] like Figure 9 As shown, a single-end mechanical seal with a static ring and a dynamic ring positioned from farthest to closest to the motor chamber is defined as an inner mechanical seal. An inner mechanical seal is provided on the other side of the sealed bearing 5. The static ring of the inner mechanical seal is integrally formed with or separately connected to the outer ring of the first bearing body 9. The inner mechanical seal prevents leakage of insulating oil from the motor chamber.

[0061] like Figure 6 As shown, a fixed gasket 17 is provided between the first stationary ring 15 and the outer ring of the first bearing body 9. The first stationary ring 15 and the fixed gasket 17 are sealed against each other via a sealing gasket 10. The fixed gasket 17 is then abutted against the outer ring of the first bearing body 9. The fixed gasket 17 is used to raise the first external mechanical seal and provide a mounting position for the first external mechanical seal.

[0062] Figure 10 The specific structure of the combined seal 8 is shown. The double-end mechanical seal includes two second stationary rings 20 and two second dynamic rings 21. The second stationary ring 20 at one end is integrally formed with the outer ring of the second bearing body 19 or is sealed in a split manner. The second stationary ring 20 at the other end is sealed and connected to the inner periphery of the mounting tube 2. The two second stationary rings 20 and the two second dynamic rings 21 are rotated and sealed in a one-to-one manner, and an oil chamber 7 is formed between the two second stationary rings 20.

[0063] This embodiment details several possible implementation forms of the sealed bearing 5 and the combined seal 8, combining the external mechanical seal with the bearing so that the bearing provides an installation position for the external mechanical seal, eliminating the need for a partition. The bearing is installed on the end cover, shortening the structural length of the pump body and reducing processing costs.

[0064] like Figures 1-4 As shown, an oil filling hole is opened on the side wall of the oil chamber 20, and the oil filling wire 19 opens or blocks the oil filling hole. By opening an oil filling hole on the side wall of the oil chamber 20 and blocking the oil filling hole through the oil filling wire 19, the oil chamber 20 can be filled with oil.

[0065] like Figure 1 、 Figure 5As shown, in order to prevent water from entering between the mounting cylinder 2 and the first bearing body 9 or the second bearing body 19, a first sealing groove is provided on the outer periphery of the outer ring of the first bearing body 9, and a first O-ring is provided in the first sealing groove. A second sealing groove is provided on the outer periphery of the outer ring of the second bearing body 19, and a second O-ring is provided in the second sealing groove. A third sealing groove is provided on the inner wall of the mounting cylinder 2, and a third O-ring is provided in the third sealing groove. The mounting cylinder 2 and the first bearing body 9 are sealedly connected by the first O-ring and the third sealing ring, or the mounting cylinder 2 and the second bearing body 19 are sealedly connected by the second O-ring and the third sealing ring.

[0066] Embodiment 3: The upper end cap 32 and the motor housing 23 can be integrally formed or separately connected. The lower end cap 1 and the motor housing 23 can be integrally formed or separately connected. The lower end cap 1 and the pump head 28 can be integrally formed or separately connected. The pump head 28 and the water inlet seat 29 can be integrally formed or separately connected. The motor housing 23 and the pump head 28 can be integrally formed or separately connected.

[0067] One side of the motor barrel 23 can also be integrally formed with a water outlet pipe 30, and the water outlet 31 is connected to the pump head 28 through the water outlet pipe 30. When the motor barrel 23 and the pump head 28 are integrally formed, the water outlet pipe 30 and the pump head 28 are integrally formed. When the motor barrel 23 and the pump head 28 are separately connected, the water outlet pipe 30 and the pump head 28 are separately connected.

[0068] The top of the motor barrel 23 may also be provided with a pump cap 33. One side of the motor barrel 23 may also be provided with a capsule barrel 26, and an adjustment capsule 27 is provided in the capsule barrel 26. The structure and use of the capsule barrel 26 and the adjustment capsule 27 can be referred to the invention described in the utility model publication number CN203978864U by the inventor of the present application.

[0069] Figure 11 This is a schematic diagram of a pump structure in which the upper end cover 32 and motor barrel 23 are integrally formed, the motor barrel 23, lower end cover 1, and pump head 28 are separately connected, the pump head 28 is separately connected to the water inlet seat 29, a reservoir barrel 26 and an adjustment bladder 27 are provided, and the outlet pipe 30 and pump cap 33 are not provided. The upper end cover 32 and motor barrel 23 are integrally formed, which is simple in structure and low in cost, and there is no need to disassemble the connection between the upper end cover 32 and motor barrel 23. Unlike the pump structure in which the end cover 1, motor barrel 23, and pump head 28 are integrally formed, the lower end cover 1 is separately connected, making it easy to disassemble and repair the lower end cover 1.

[0070] Figure 12The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23 is separately connected to the lower end cover 1, and the lower end cover 1 is integrally formed with the pump head 28, and the motor barrel 23 is separately connected to the pump head 28, and the pump head 28 is separately connected to the water inlet seat 29, and a pump cap 33 is provided, and the water outlet pipe 30, the storage bag barrel 26 and the regulating bag 27 are not provided; different from Figure 11 The pump body structure is such that the lower end cover 1 is separately connected to the motor barrel 23, but is integrally formed with the pump head 28, which also facilitates the disassembly and maintenance of the lower end cover 1.

[0071] Figure 13 The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23 is separately connected to the lower end cover 1, and the lower end cover 1 is integrally formed with the pump head 28, and the motor barrel 23 is separately connected to the pump head 28, and the pump head 28 is separately connected to the water inlet seat 29, and the storage bag barrel 26 and the regulating bag 27 are provided, and the water outlet pipe 30 and the pump cap 33 are not provided;

[0072] Figure 14 The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23 is integrally formed with the lower end cover 1, and the lower end cover 1 is separately connected to the pump head 28, and the motor barrel 23 is separately connected to the pump head 28, and the pump head 28 is separately connected to the water inlet seat 29, and the storage bag barrel 26 and the adjustment bag 27 are provided, and the water outlet pipe 30 and the pump cap 33 are not provided; different from Figure 11 and Figure 12 The pump body structure is such that the lower end cover 1 is integrally formed with the motor barrel 23 but is separately connected to the pump head 28, which also facilitates the disassembly and maintenance of the lower end cover 1.

[0073] Figure 15 The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23, the lower end cover 1 and the pump head 28 are integrally formed, and the pump head 28 is separately connected to the water inlet seat 29, and a pump cap 33 is provided, and the water outlet pipe 30, the storage bag barrel 26 and the adjustment bag 27 are not provided. The structural diagram; the motor barrel 23, the lower end cover 1 and the pump head 28 are integrally formed, the structure is simple, the cost is low, and it is suitable for small pumps.

[0074] Figure 16 The upper end cover 32 and the pump cap 33 are combined into one, the pump cap 33 is the upper end cover 32, and the pump cap 33 is separately connected to the motor barrel 23, and the motor barrel 23 and the pump head 28 are formed as one piece, and the lower end cover 1 is separately connected to the motor barrel 23, and the pump head 28 is separately connected to the water inlet seat 29, and the water outlet pipe 30 and the storage bag barrel 26 and the adjustment bag 27 are not provided. The structural diagram; the lower end cover 1 is separately connected to the motor barrel 23, and the lower end cover 1 is separately connected to the motor barrel 23 and the pump head 28, and the pump can be divided into two parts, the inner part has the rotating shaft 3 and the impeller 22, and the outer part has the motor barrel 23 and the stator 24, etc., which is easy to maintain and suitable for high-power pumps.

[0075] Figure 17 The upper end cover 32 and the motor barrel 23 are integrally formed, and the motor barrel 23 is separately connected to the lower end cover 1, and the lower end cover 1 is separately connected to the pump head 28, and the pump head 28 is separately connected to the water inlet seat 29, and the water outlet pipe 30, the storage bag barrel 26 and the regulating bag 27 are provided, and the pump cap 33 is not provided;

[0076] Figure 18 The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23 is integrally formed with the lower end cover 1. The lower end cover 1 is separately connected to the pump head 28, and the pump head 28 is integrally formed with the water inlet seat 29. The water outlet pipe 30 and the pump cap 33 are provided, and the storage barrel 26 and the regulating capsule 27 are not provided.

[0077] Figure 19 The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23, the lower end cover 1 and the pump head 28 are integrally formed, and the pump head 28 is separately connected to the water inlet seat 29, and a water outlet pipe 30 and a pump cap 33 are provided, and the storage barrel 26 and the regulating capsule 27 are not provided. The structural diagram is as follows; in existing water-cooled submersible pumps, the outlet conduit and the pump head must be a separately connected structure. In order for the connection form not to affect the processing, the outlet conduit must also be a cylindrical tube, so the outlet conduit is generally U-shaped (the U-shaped outlet conduit has a small cooling area, uses a lot of materials, is bulky, and has low efficiency). The connection between the outlet conduit and the pump head is O-shaped, which is difficult to process. The outlet conduit and the pump head are fixed and sealed by screws, which can easily lead to water leakage. There is a gap between the O-shaped outlet of the pump head and the pump body. The structure is not compact, the fixation is weak, and it is easy for water to enter. Figure 19 As shown, the motor barrel 23, the lower end cover 1 and the pump head 28 are integrally formed, and the water outlet pipe 30 and the pump head 28 are also integrally formed, which can solve the above problem.

[0078] Figure 20 The upper end cover 32 is separately connected to the motor barrel 23, and the motor barrel 23 and the pump head 28 are integrally formed, and the lower end cover 1 is separately connected to the motor barrel 23, and the pump head 28 is separately connected to the water inlet seat 29, and a water outlet pipe 30 and a pump cap 33 are provided, and the storage bag barrel 26 and the regulating bag 27 are not provided. Figure 20 In the mechanism shown, the motor barrel 23 and the pump head 28 are integrally formed, and the lower end cover 1 is separately connected to the motor barrel 23, and the lower end cover 1 can be removed separately for maintenance.

[0079] In this embodiment, various forms of pump bodies are provided. The inventor's intention is to arrange and combine the connection methods of the upper end cover 32, motor barrel 23, lower end cover 1, pump head 28, and water inlet seat 29, as well as whether to provide a pump cap 33, a water outlet pipe 30, a storage bag barrel 26, and an adjustment bag 27, and whether the water outlet pipe 30 and the pump head are integrally formed or separately connected. Various combinations are within the scope of protection of the present invention.

[0080] The above embodiments are merely illustrative of the present invention and do not limit its scope of protection. Those skilled in the art may make partial changes thereto, which are within the scope of protection of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A water pump structure, characterized in that: The pump body comprises a motor barrel (23), a pump head (28) and a water inlet seat (29) connected in sequence, the pump head (28) and the motor barrel (23) are separated by a lower end cover (1), the water outlet (31) is connected to one side of the pump head (28), the upper end cover (32) blocks the top of the motor barrel (23), the upper end of the rotating shaft (3) is rotatably matched with the upper end cover (32), the lower end of the rotating shaft (3) passes through the lower end cover (1) and is connected to the impeller (22) arranged in the pump head (28), the rotating shaft (3) is sleeved with a rotor (25), the inner wall of the motor barrel (23) is provided with a stator (24), and the rotor (25) and the stator (24) are rotatably matched with each other inside and outside; A mounting cylinder (2) is provided on the lower end cover (1), and a single-end mechanical seal in which a static ring and a dynamic ring are arranged from near to far relative to the motor cylinder (23) is defined as an external mechanical seal. The first bearing body (9) is coaxially connected to the first external mechanical seal to form a sealed bearing (5). The outer ring of the second bearing body (19) is connected to the double-end mechanical seal on the side away from the motor chamber to form a combined seal (8). At least one set of sealed bearings (5) and one set of bearingless seals (6) are provided in the mounting cylinder (2). The bearingless seals (6) are one of an external mechanical seal, an oil seal or a sealing ring. An oil chamber (7) is formed between the sealed bearing (5) and the adjacent bearingless seals (6), or the mounting cylinder ( 2) at least two sets of sealed bearings (5) are provided in the cylinder, an oil chamber (7) is formed between two adjacent sets of sealed bearings (5), or at least one set of combined seals (8) is provided in the cylinder (2), an oil chamber (7) is formed between the two ends of the double-end mechanical seal, the rotating shaft (3) and the cylinder (2) are rotationally matched through the first bearing body (9) or the second bearing body (19), and the rotating shaft (3) and the cylinder (2) are rotationally sealed through at least two first external mechanical seals, or the rotating shaft (3) and the cylinder (2) are rotationally sealed through the first external mechanical seal and the bearingless seal (6), or the rotating shaft (3) and the cylinder (2) are rotationally sealed through at least one set of double-end mechanical seals.

2. A water pump structure according to claim 1, characterized in that: The first external mechanical seal comprises a first dynamic ring (11) and a first static ring (15), the first static ring (15) being integrally formed with or separately connected to the outer ring of the first bearing body (9), and the first dynamic ring (11) and the first static ring (15) being engaged in a rotational sealing manner; The double-end mechanical seal comprises two second stationary rings (20) and two second dynamic rings (21), wherein the second stationary ring (20) at one end is integrally formed with the outer ring of the second bearing body (19) or is sealed separately, and the second stationary ring (20) at the other end is sealedly connected to the inner circumference of the mounting cylinder (2), the two second stationary rings (20) and the two second dynamic rings (21) are rotated and sealed in a one-to-one correspondence, and an oil chamber (7) is formed between the two second stationary rings (20).

3. A water pump structure according to claim 1 or 2, characterized in that: The upper end cover (32) and the motor cylinder (23) are integrally formed or separately connected.

4. A water pump structure according to claim 1 or 2, characterized in that: The lower end cover (1) and the motor cylinder (23) are integrally formed or separately connected.

5. A water pump structure according to claim 1 or 2, characterized in that: The lower end cover (1) and the pump head (28) are integrally formed or separately connected.

6. A water pump structure according to claim 1 or 2, characterized in that: The motor barrel (23) and the pump head (28) are integrally formed or connected in a split manner.

7. A water pump structure according to claim 6, characterized in that: A water outlet pipe (30) is integrally formed on one side of the motor barrel (23), and the water outlet (31) is connected to the pump head (28) through the water outlet pipe (30). When the motor barrel (23) and the pump head (28) are integrally formed, the water outlet pipe (30) and the pump head (28) are integrally formed. When the motor barrel (23) and the pump head (28) are separately connected, the water outlet pipe (30) and the pump head (28) are separately connected.

8. A water pump structure according to claim 6, characterized in that: When the motor barrel (23) and the pump head (28) are integrally formed, the lower end cover (1) and the motor barrel (23) are integrally formed or separately connected.

9. A water pump structure according to claim 1 or 2, characterized in that: A pump cap (33) is provided on the top end of the motor cylinder (23).

10. A water pump structure according to claim 1 or 2, characterized in that: A capsule storage tube (26) is provided on one side of the motor tube (23), and an adjustment capsule (27) is provided in the capsule storage tube (26).

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