High pressure stable pump

Abstract

The utility model relates to the technical field of centrifugal pump discloses a high pressure stable pump, including low pressure section, high pressure section, inlet and outlet water section, transition elbow and pump shaft, low pressure section, inlet and outlet water section and high pressure section are coaxial connection in pump shaft respectively, and inlet and outlet water section is located between low pressure section and high pressure section, and low pressure section is equipped with medium inlet, and inlet and outlet water section is equipped with medium outlet, and low pressure section communicates with the one end of transition elbow through inlet and outlet water section, and the other end of transition elbow communicates with the one end of high pressure section away from inlet and outlet water section, and high pressure section communicates with medium outlet, low pressure section is equipped with first rod body, and high pressure section is equipped with second rod body, and first rod body, second rod body and the extension direction of pump shaft are same, and low pressure section is connected with inlet and outlet water section through first rod body, and high pressure section is connected with inlet and outlet water section through second rod body, the high pressure stable pump of the utility model avoids the deviation caused by assembly error, improves assembly positioning accuracy, improves assembly coaxial degree, reduces vibration and abrasion and ensures the reliable and safe operation of multistage pump.

Description

Technical Field

[0001] This utility model relates to the technical field of centrifugal pumps, and in particular to a high-pressure stable pump. Background Technology

[0002] Currently, traditional multistage pumps typically employ a series structure, with each pump body connected sequentially along the pump shaft, and pressurization achieved through impellers at each stage. Because the pump bodies are installed sequentially, assembly errors from the previous stage are transmitted to the next, leading to cumulative errors that affect overall coaxiality and consequently reduce pump operating efficiency and stability. Furthermore, multistage pumps require step-by-step alignment, making assembly difficult, especially in high-precision applications, where adjustments are time-consuming and it is challenging to guarantee the concentricity of each pump body. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a high-pressure stable pump that avoids misalignment caused by assembly errors, improves assembly positioning accuracy, enhances assembly coaxiality, reduces vibration and wear, and ensures the reliable and safe operation of multi-stage pumps.

[0004] To achieve the above objectives, this utility model provides a high-pressure stabilizing pump, comprising a low-pressure section, a high-pressure section, an inlet / outlet section, a transition bend, and a pump shaft. The pump shaft is coaxially disposed within the low-pressure section, the inlet / outlet section, and the high-pressure section. The inlet / outlet section is located between the low-pressure section and the high-pressure section. The low-pressure section has a medium inlet, and the inlet / outlet section has a medium outlet. The low-pressure section is connected to one end of the transition bend through the inlet / outlet section, and the other end of the transition bend is connected to the end of the high-pressure section away from the inlet / outlet section. The high-pressure section is connected to the medium outlet.

[0005] The low-pressure section is provided with a first rod, and the high-pressure section is provided with a second rod. The first rod and the second rod extend in the same direction as the pump shaft. The low-pressure section is connected to the inlet and outlet water sections through the first rod, and the high-pressure section is connected to the inlet and outlet water sections through the second rod.

[0006] As a preferred embodiment, the first rod body includes a low-pressure tie rod, the outer periphery of the low-pressure section is provided with a low-pressure connection hole, the inlet and outlet sections are provided with a first connection hole facing the outer periphery of the low-pressure section, one end of the low-pressure tie rod is connected to the low-pressure connection hole, and the other end is connected to the first connection hole.

[0007] As a preferred embodiment, multiple low-pressure tie rods are provided, and the number and position of the low-pressure connection holes and the first connection holes are respectively provided corresponding to the low-pressure tie rods. The multiple low-pressure tie rods are arranged at intervals along the circumference of the pump shaft.

[0008] As a preferred embodiment, the first rod body includes a low-pressure stabilizing rod with a polygonal outer periphery. The low-pressure section includes an inlet section and a low-pressure intermediate section connected to the pump shaft. The medium inlet and the low-pressure connection hole are located in the inlet section. The inlet section communicates with the inlet and outlet sections through the low-pressure intermediate section to form a low-pressure cavity. A first stabilizing hole is provided on the outer periphery of the inlet section, a second stabilizing hole is provided on the outer periphery of the low-pressure intermediate section, and a third stabilizing hole is provided on the side of the inlet and outlet sections facing the low-pressure section. The shapes of the first stabilizing hole, the second stabilizing hole, and the third stabilizing hole correspond to the outer periphery shape and position of the low-pressure stabilizing rod. The low-pressure stabilizing rod passes through the second stabilizing hole, and both ends of the low-pressure stabilizing rod are connected to the first stabilizing hole and the second stabilizing hole, respectively.

[0009] As a preferred embodiment, the first stabilizing hole is located at the upper end of the water inlet section, the second stabilizing hole is located at the upper end of the low-pressure intermediate section, and the third stabilizing hole is connected to the upper end of the water inlet and outlet sections.

[0010] As a preferred embodiment, the second rod body includes a high-pressure pull rod, the outer periphery of the high-pressure section is provided with a high-pressure connection hole, the inlet and outlet sections are provided with a second connection hole facing the outer periphery of the high-pressure section, one end of the high-pressure pull rod is connected to the high-pressure connection hole, and the other end is connected to the second connection hole.

[0011] As a preferred embodiment, the second rod body includes a high-pressure stabilizing rod with a polygonal outer periphery. The high-pressure section includes a secondary inlet section and a high-pressure intermediate section, which are respectively connected to the pump shaft. The high-pressure connecting hole is opened in the secondary inlet section. The secondary inlet section is connected to the inlet and outlet sections through the high-pressure intermediate section to form a high-pressure cavity. A fourth stabilizing hole is provided on the outer periphery of the secondary inlet section. A fifth stabilizing hole is provided on the outer periphery of the high-pressure intermediate section. A sixth stabilizing hole is provided on the side of the inlet and outlet sections facing the high-pressure section. The shapes of the fourth, fifth, and sixth stabilizing holes correspond to the outer periphery shape and position of the high-pressure stabilizing rod. The high-pressure stabilizing rod passes through the fifth stabilizing hole, and its two ends are respectively connected to the fourth and sixth stabilizing holes.

[0012] As a preferred embodiment, the fourth stabilizing hole is located at the upper end of the secondary water inlet section, the fifth stabilizing hole is located at the upper end of the high-pressure intermediate section, and the sixth stabilizing hole is connected to the upper end of the water inlet and outlet sections.

[0013] As a preferred embodiment, multiple high-pressure tie rods are provided, and the number and position of the high-pressure connection holes and the second connection holes are respectively provided corresponding to the high-pressure tie rods. The multiple high-pressure tie rods are arranged at intervals along the circumference of the pump shaft.

[0014] As a preferred embodiment, the low-pressure section is fitted with a low-pressure cylinder, the first rod is located inside the low-pressure cylinder, the medium inlet is exposed outside the low-pressure cylinder, the high-pressure section is fitted with a high-pressure cylinder, the second rod is located inside the high-pressure cylinder, the inlet / outlet water section is located between the low-pressure cylinder and the high-pressure cylinder, one end of the low-pressure cylinder and one end of the high-pressure cylinder are respectively connected to the inlet / outlet water section, and the transition bend is located on the outer periphery of the high-pressure cylinder.

[0015] Compared with the prior art, the high-pressure stabilizing pump of this utility model embodiment has the following advantages: the low-pressure section, high-pressure section, and inlet / outlet water section are coaxially connected to the pump shaft. The water requiring pressurization enters from the medium inlet of the low-pressure section and is pressurized sequentially in the low-pressure flow channel of the low-pressure section and the high-pressure flow channel of the high-pressure section to form a high-pressure medium, which flows out from the medium outlet of the inlet / outlet water section. The low-pressure section is connected to the inlet / outlet water section through a first rod to form a first assembly, and the high-pressure section is connected to the inlet / outlet water section through a second rod to form a second assembly. This controls the cumulative error of each assembly within a local range, avoiding error superposition. The first rod and the second rod extend in the same direction as the pump shaft, forming a symmetrical double-support positioning structure in the direction of the pump shaft. Combined with the central constraint of the pump shaft itself, a three-point positioning structure is formed, ensuring that the relative axial positions of the low-pressure section, high-pressure section, and inlet / outlet water section are directly controlled by the first rod and the second rod, avoiding offset caused by assembly errors and improving assembly positioning accuracy. The inlet and outlet sections are located between the low-pressure and high-pressure sections. As intermediate reference components, these sections are fixed first during assembly. They are then connected to the low-pressure section via the first rod and to the high-pressure section via the second rod, forming an assembly logic that uses the middle section to define both ends. This reduces the difficulty of step-by-step alignment in traditional multistage pumps and ensures the coaxiality of the low-pressure, high-pressure, and inlet / outlet sections. Precise positioning and matching of the low-pressure, high-pressure, and inlet / outlet sections ensure concentricity during assembly and operation. During multistage centrifugal pump operation, the impellers in the low-pressure and high-pressure sections generate axial forces. The first and second rods rigidly connect the low-pressure and high-pressure sections to the inlet / outlet sections, transferring these axial forces to the inlet / outlet sections. This avoids force concentration on the pump shaft, reducing vibration and wear and ensuring reliable and safe operation of the multistage pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the low-pressure section in an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the high-voltage section in an embodiment of this utility model.

[0019] Figure 4 This is a cross-sectional view of the internal structure of the inlet and outlet water sections in an embodiment of this utility model.

[0020] Figure 5 This is a side view of the inlet and outlet water sections of an embodiment of this utility model.

[0021] Figure 6 This is a cross-sectional view of the internal structure of the water inlet section in an embodiment of this utility model.

[0022] Figure 7 This is a structural schematic diagram of the water inlet section facing the water inlet / outlet section in an embodiment of this utility model.

[0023] Figure 8 This is a cross-sectional view of the internal structure of the low-pressure middle section in an embodiment of this utility model.

[0024] Figure 9 This is a side view of the low-pressure middle section of an embodiment of this utility model.

[0025] Figure 10 This is a schematic diagram of the structure of the water inlet section facing the water inlet / outlet section in an embodiment of this utility model.

[0026] Figure 11 This is a cross-sectional view of the internal structure of the secondary water inlet section according to an embodiment of the present invention.

[0027] Figure 12 This is a side view of the high-voltage intermediate section of an embodiment of this utility model.

[0028] Figure 13 This is a cross-sectional view of the internal structure of the high-voltage intermediate section in an embodiment of this utility model.

[0029] In the picture:

[0030] 1001, Low-pressure section; 1002, Medium inlet; 1003, First rod; 1004, Low-pressure tie rod; 1005, Low-pressure connection hole; 1006, Low-pressure stabilizing rod; 1007, Water inlet section; 1008, First stabilizing hole; 1009, Low-pressure intermediate section; 1010, Second stabilizing hole; 1011, Low-pressure cavity; 1012, Low-pressure cylinder; 1013, Low-pressure impeller

[0031] 2001, High-pressure section; 2002, Second rod body; 2003, High-pressure tie rod; 2004, High-pressure connection hole; 2005, High-pressure stabilizer rod; 2006, Secondary water inlet section; 2007, Fourth stabilizer hole; 2008, High-pressure intermediate section; 2009, Fifth stabilizer hole; 2010, High-pressure cavity; 2011, High-pressure cylinder; 2012, High-pressure impeller;

[0032] 3001, Inlet / Outlet Section; 3002, Medium Outlet; 3003, Third Stabilizing Hole; 3004, First Connecting Hole; 3005, Second Connecting Hole; 3006, Sixth Stabilizing Hole;

[0033] 4001, Transition bend;

[0034] 5001, Pump Shaft. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] like Figures 1 to 13 As shown, a preferred embodiment of the present invention provides a high-pressure stabilizing pump, comprising a low-pressure section 1001, a high-pressure section 2001, an inlet / outlet section 3001, a transition bend 4001, and a pump shaft 5001. The pump shaft 5001 is coaxially inserted through the low-pressure section 1001, the inlet / outlet section 3001, and the high-pressure section 2001, respectively. The low-pressure section 1001, the inlet / outlet section 3001, and the high-pressure section 2001 are coaxially connected to the pump shaft 5001. The inlet / outlet section 3001... 001 is located between the low-pressure section 1001 and the high-pressure section 2001. The low-pressure section 1001 is provided with a medium inlet 1002, and the inlet / outlet section 3001 is provided with a medium outlet 3002. The low-pressure section 1001 is connected to one end of the transition bend 4001 through the inlet / outlet section 3001. The other end of the transition bend 4001 is connected to the end of the high-pressure section 2001 away from the inlet / outlet section 3001. The high-pressure section 2001 is connected to the medium outlet 3002.

[0039] The low-pressure section 1001 is provided with a first rod 1003, and the high-pressure section 2001 is provided with a second rod 2002. The first rod 1003 and the second rod 2002 extend in the same direction as the pump shaft 5001. The low-pressure section 1001 is connected to the inlet and outlet water section 3001 through the first rod 1003, and the high-pressure section 2001 is connected to the inlet and outlet water section 3001 through the second rod 2002.

[0040] This utility model discloses a high-pressure stabilizing pump. A low-pressure section 1001, a high-pressure section 2001, and an inlet / outlet section 3001 are coaxially connected to a pump shaft 5001. Water requiring pressurization enters through the medium inlet 1002 of the low-pressure section 1001 and is pressurized sequentially in the low-pressure flow channel of the low-pressure section 1001 and the high-pressure flow channel of the high-pressure section 2001 to form a high-pressure medium. The high-pressure medium flows out through the medium outlet 3002 of the inlet / outlet section 3001. The low-pressure section 1001 is connected to the inlet / outlet section 3001 via a first rod 1003 to form a first assembly. The high-pressure section 2001 is connected to the inlet / outlet section 3001 via a second rod 2002 to form a second assembly. This design controls the cumulative error of each assembly within a local range, avoiding error aggregation. The first rod 1003 and the second rod 2002 extend in the same direction as the pump shaft 5001. The first rod 1003 and the second rod 2002 form a symmetrical double-support positioning structure in the direction of the pump shaft 5001. Combined with the central constraint of the pump shaft 5001 itself, a three-point positioning structure is formed. This ensures that the relative axial positions of the low-pressure section 1001, the high-pressure section 2001, and the inlet and outlet water sections 3001 are directly controlled by the first rod 1003 and the second rod 2002, avoiding offsets caused by assembly errors and improving assembly positioning accuracy. The inlet / outlet section 3001 is located between the low-pressure section 1001 and the high-pressure section 2001. As an intermediate reference component, the inlet / outlet section 3001 is fixed first during assembly. Then, it is connected to the low-pressure section 1001 via the first rod 1003 and to the high-pressure section 2001 via the second rod 2002. This assembly logic, using the middle section to define both ends, reduces the difficulty of step-by-step alignment in traditional multistage pumps and ensures the coaxiality of the low-pressure section 1001, high-pressure section 2001, and inlet / outlet section 3001. Precise positioning and fitting of the low-pressure section 1001, high-pressure section 2001, and inlet / outlet section 3001 ensures concentricity during assembly and operation. During multistage centrifugal pump operation, the impellers within the low-pressure section 1001 and high-pressure section 2001 generate axial forces. The low-pressure section 1001 and the high-pressure section 2001 are rigidly connected to the inlet and outlet water section 3001 by the first rod 1003 and the second rod 2002, so that the axial force is transmitted to the inlet and outlet water section 3001, avoiding the force concentration on the pump shaft 5001, reducing vibration and wear, and ensuring the reliable and safe operation of the multi-stage pump.

[0041] As one embodiment, such as Figures 1 to 3As shown, a plurality of low-pressure impellers 1013 are provided in the low-pressure section 1001, and the low-pressure impellers 1013 are located in the low-pressure cavity 1011 of the low-pressure section 1001. A plurality of high-pressure impellers 2012 are provided in the high-pressure section 2001, and the high-pressure impellers 2012 are located in the high-pressure cavity 2010 of the high-pressure section 2001. The low-pressure impellers 1013 and the high-pressure impellers 2012 are coaxially rotatably connected to the pump shaft 5001. The plurality of low-pressure impellers 1013 and the plurality of high-pressure impellers 2012 are arranged at intervals along the pump shaft 5001, and the rotation directions of the low-pressure impellers 1013 and the high-pressure impellers 2012 are opposite. The low-pressure impellers 1013 and the high-pressure impellers 2012 are existing technologies, and any impeller capable of pressurizing the medium is acceptable. The medium is pressurized in stages through a low-pressure impeller 1013 and a high-pressure impeller 2012, which is a prior art technique. The low-pressure impeller 1013 and the high-pressure impeller 2012 are fixedly connected to the pump shaft 5001. A motor is connected to the pump shaft 5001, driving the pump shaft 5001 to rotate. The pump shaft 5001 then drives the low-pressure impeller 1013 to rotate within the low-pressure section 1001, and consequently, drives the high-pressure impeller 2012 to rotate within the high-pressure section 2001.

[0042] As one embodiment, such as Figure 1 As shown, the low-pressure section 1001, the inlet and outlet water section 3001, the transition bend 4001 and the high-pressure section 2001 are connected to form a sealed medium flow channel, that is, the low-pressure cavity 1011 and the high-pressure cavity 2010 are connected to form a sealed medium flow channel.

[0043] As one embodiment, such as Figure 5 As shown, the side views of the inlet / outlet section 3001 toward the low-pressure section 1001 and toward the high-pressure section 2001 are the same.

[0044] As one embodiment, such as Figures 1 to 3 As shown, the first rod 1003 is threadedly connected to the low-pressure section 1001 and the water inlet section 1007, respectively. The second rod 2002 is threadedly connected to the high-pressure section 2001 and the water inlet section 1007, respectively.

[0045] Furthermore, the first rod body 1003 includes a low-pressure tie rod 1004. A low-pressure connection hole 1005 is provided on the outer periphery of the low-pressure section 1001, and a first connection hole 3004 is provided on the outer periphery of the inlet / outlet section 3001 facing the low-pressure section 1001. One end of the low-pressure tie rod 1004 is connected to the low-pressure connection hole 1005, and the other end is connected to the first connection hole 3004. The low-pressure connection hole 1005 is located on the outer periphery of the low-pressure section 1001, and the first connection hole 3004 is located on the outer periphery of the inlet / outlet section 3001 facing the low-pressure section 1001, thus avoiding affecting the sealing of the medium flow channel. Simultaneously, the low-pressure tie rod 1004 serves as a rigid support structure, improving the connection stability and operational stability between the low-pressure section 1001 and the inlet / outlet section 3001.

[0046] As one embodiment, such as Figure 5 and Figure 7 As shown, the low-pressure tie rod 1004 is cylindrical.

[0047] Furthermore, such as Figures 1 to 9 As shown, the first rod body 1003 includes a low-pressure stabilizing rod 1006, the outer periphery of which is polygonal. The low-pressure section 1001 includes an inlet section 1007 and a low-pressure intermediate section 1009, which are respectively connected to the pump shaft 5001. A medium inlet 1002 and a low-pressure connection hole 1005 are opened in the inlet section 1007. The inlet section 1007 is connected to the inlet and outlet sections 3001 through the low-pressure intermediate section 1009 to form a low-pressure cavity 1011. A first stabilizing hole 1008 is provided on the outer periphery of the inlet section 1007. The low-pressure intermediate section 1009 is provided with a second stabilizing hole 1010 on its outer periphery, and the inlet / outlet section 3001 is provided with a third stabilizing hole 3003 on the side facing the low-pressure section 1001. The shapes of the first stabilizing hole 1008, the second stabilizing hole 1010 and the third stabilizing hole 3003 are respectively provided to correspond to the outer periphery shape and position of the low-pressure stabilizing rod 1006. The low-pressure stabilizing rod 1006 passes through the second stabilizing hole 1010, and the two ends of the low-pressure stabilizing rod 1006 are respectively connected to the first stabilizing hole 1008 and the second stabilizing hole 1010. The low-pressure stabilizing rod 1006 has a polygonal outer shape. During assembly, one end of the low-pressure stabilizing rod 1006 is connected to the third stabilizing hole 3003, and the other end passes through the second stabilizing hole 1010 and then connects to the first stabilizing hole 1008, thereby enabling the assembly of the inlet section 1007, the low-pressure intermediate section 1009, and the inlet / outlet section 3001. The low-pressure stabilizing rod 1006 is connected to the first stabilizing hole 1008, the second stabilizing hole 1010, and the third stabilizing hole 3003 respectively, facilitating positioning during assembly. The polygonal shape of the low-pressure stabilizing rod 1006, corresponding to the shapes of the first stabilizing hole 1008, the second stabilizing hole 1010, and the third stabilizing hole 3003, prevents relative rotation of the assembled inlet section 1007, the low-pressure intermediate section 1009, and the inlet / outlet section 3001, reducing assembly difficulty.

[0048] As one embodiment, such as Figure 5 , Figure 7 and Figure 9 As shown, the low-pressure stabilizer bar 1006 is provided with multiple bars. The number of the first stabilizer hole 1008, the second stabilizer hole 1010 and the third stabilizer hole 3003 are respectively set to correspond to the number of low-pressure stabilizer bars 1006, which further improves the assembly stability of the water inlet section 1007, the low-pressure middle section 1009 and the water inlet and outlet section 3001.

[0049] In one embodiment, the low-pressure intermediate section 1009 is provided with a low-pressure mounting cavity, and the low-pressure impeller 1013 is rotatably mounted in the low-pressure mounting cavity. Multiple low-pressure intermediate sections 1009 can be provided, and the multiple low-pressure intermediate sections 1009 are connected through the low-pressure mounting cavities, and the multiple low-pressure intermediate sections 1009 are sequentially connected along the pump shaft 5001.

[0050] Furthermore, such as Figure 5 , Figure 7 and Figure 9 As shown, the first stabilizing hole 1008 is located at the upper end of the inlet section 1007, the second stabilizing hole 1010 is located at the upper end of the low-pressure intermediate section 1009, and the third stabilizing hole 3003 is connected to the upper end of the inlet / outlet section 3001. The upper end of the low-pressure section 1001 typically bears external loads from the inlet pipe. The low-pressure stabilizing rod 1006 is installed at the upper end of the low-pressure section 1001 and the inlet / outlet section 3001 through the first stabilizing hole 1008, the second stabilizing hole 1010, and the third stabilizing hole 3003 to enhance the rigidity of this area, reduce deformation caused by external forces, and thus protect the sealing accuracy of the inlet section 1007, the low-pressure intermediate section 1009, and the inlet / outlet section 3001.

[0051] Furthermore, such as Figure 5 , Figure 7 and Figure 9 As shown, multiple low-pressure tie rods 1004 are provided. The number and position of low-pressure connection holes 1005 and first connection holes 3004 are respectively provided with respect to the low-pressure tie rods 1004. Multiple low-pressure tie rods 1004 are arranged at intervals along the circumference of the pump shaft 5001 so that the circumferential connection force between the low-pressure section 1001 and the inlet / outlet water section 3001 is more uniform, thereby improving the stability of the connection structure between the low-pressure section 1001 and the inlet / outlet water section 3001.

[0052] Furthermore, such as Figures 3 to 5 as well as Figures 10 to 13 As shown, the second rod 2002 includes a high-pressure tie rod 2003. A high-pressure connection hole 2004 is provided on the outer periphery of the high-pressure section 2001, and a second connection hole 3005 is provided on the outer periphery of the inlet / outlet section 3001 facing the high-pressure section 2001. One end of the high-pressure tie rod 2003 is connected to the high-pressure connection hole 2004, and the other end is connected to the second connection hole 3005. The high-pressure connection hole 2004 is located on the outer periphery of the high-pressure section 2001, and the second connection hole 3005 is located on the outer periphery of the inlet / outlet section 3001 facing the high-pressure section 2001, thus avoiding affecting the sealing of the medium flow channel. Simultaneously, the high-pressure tie rod 2003 serves as a rigid support structure, improving the connection stability and operational stability of the high-pressure section 2001 and the inlet / outlet section 3001.

[0053] As one embodiment, such as Figures 3 to 5 as well as Figures 10 to 13As shown, there are multiple high-pressure tie rods 2003, which are spaced apart circumferentially along the pump shaft 5001. The number and position of the high-pressure connection holes 2004 and the second connection holes 3005 correspond to the high-pressure tie rods 2003. Increasing the number of high-pressure tie rods 2003 can further improve the connection stability and operational stability of the high-pressure section 2001 and the inlet / outlet water section 3001.

[0054] As one embodiment, such as Figures 3 to 5 as well as Figures 10 to 13 As shown, the high-pressure tie rod 2003 is cylindrical.

[0055] Furthermore, such as Figures 3 to 5 as well as Figures 10 to 13 As shown, the second rod body 2002 includes a high-pressure stabilizing rod 2005, the outer periphery of which is polygonal. The high-pressure section 2001 includes a secondary water inlet section 2006 and a high-pressure intermediate section 2008, which are respectively connected to the pump shaft 5001. A high-pressure connecting hole 2004 is opened in the secondary water inlet section 2006. The secondary water inlet section 2006 is connected to the inlet and outlet sections 3001 through the high-pressure intermediate section 2008 to form a high-pressure cavity 2010. A fourth stabilizing hole 2007 is provided on the outer periphery of the secondary water inlet section 2006. The outer periphery of section 2008 is provided with a fifth stabilizing hole 2009, and the side of the inlet / outlet section 3001 facing the high pressure section 2001 is provided with a sixth stabilizing hole 3006. The shapes of the fourth stabilizing hole 2007, the fifth stabilizing hole 2009 and the sixth stabilizing hole 3006 are respectively set to correspond to the outer periphery shape and position of the high pressure stabilizing rod 2005. The high pressure stabilizing rod 2005 passes through the fifth stabilizing hole 2009, and the two ends of the high pressure stabilizing rod 2005 are respectively connected to the fourth stabilizing hole 2007 and the sixth stabilizing hole 3006. The high-pressure stabilizer bar 2005 has a polygonal outer shape. During assembly, one end of the high-pressure stabilizer bar 2005 is connected to the fourth stabilizing hole 2007, and the other end passes through the fifth stabilizing hole 2009, and then connects to the sixth stabilizing hole 3006. This allows for the assembly of the secondary water inlet section 2006, the high-pressure intermediate section 2008, and the water inlet / outlet section 3001. The high-pressure stabilizer bar 2005 is connected to the fourth stabilizing hole 2007, the fifth stabilizing hole 2009, and the sixth stabilizing hole 3006 respectively, facilitating positioning during assembly. The polygonal shape of the high-pressure stabilizer bar 2005, corresponding to the shapes of the fourth stabilizing hole 2007, the fifth stabilizing hole 2009, and the sixth stabilizing hole 3006, prevents relative rotation of the secondary water inlet section 2006, the high-pressure intermediate section 2008, and the water inlet / outlet section 3001 after assembly, reducing assembly difficulty.

[0056] As one embodiment, such as Figures 3 to 5 as well as Figures 10 to 13As shown, the high-pressure stabilizer bar 2005 is provided with multiple bars. The number of the fourth stabilizer hole 2007, the fifth stabilizer hole 2009 and the sixth stabilizer hole 3006 are respectively set to correspond to the number of high-pressure stabilizer bars 2005, which further improves the assembly stability of the secondary water inlet section 2006, the high-pressure intermediate section 2008 and the water inlet and outlet section 3001.

[0057] As one embodiment, such as Figures 3 to 5 as well as Figures 10 to 13 As shown, the high-pressure intermediate section 2008 is provided with a high-pressure mounting cavity, and the high-pressure impeller 2012 is rotatably mounted in the high-pressure mounting cavity. Multiple high-pressure intermediate sections 2008 can be provided, and these multiple high-pressure intermediate sections 2008 are connected through high-pressure mounting cavities. These multiple high-pressure intermediate sections 2008 are sequentially connected along the pump shaft 5001, so that the high-pressure impeller 2012 rotates within the high-pressure mounting cavity and pressurizes the flowing medium within the high-pressure mounting cavity.

[0058] Furthermore, such as Figures 3 to 5 as well as Figures 10 to 13 As shown, the fourth stabilizing hole 2007 is located at the upper end of the secondary inlet section 2006, the fifth stabilizing hole 2009 is located at the upper end of the high-pressure intermediate section 2008, and the sixth stabilizing hole 3006 is connected to the upper end of the inlet / outlet section 3001. With the fourth stabilizing hole 2007, the fifth stabilizing hole 2009, and the sixth stabilizing hole 3006 located at the upper end, during assembly, the high-pressure stabilizing rod 2005 is fixed first, and then the pump shaft 5001 is adjusted, forming a dual constraint of upper-end positioning and pump shaft 5001 support, reducing assembly deviations and improving overall coaxiality. The high-pressure stabilizing rod 2005 and the pump shaft 5001 jointly bear the axial force, forming a multi-point support structure, allowing part of the axial force to be transmitted through the high-pressure stabilizing rod 2005 to the secondary inlet section 2006, the high-pressure intermediate section 2008, and the inlet / outlet section 3001, rather than relying solely on the bearings, thereby reducing bearing wear and extending service life.

[0059] Furthermore, such as Figures 3 to 5 as well as Figures 10 to 13 As shown, multiple high-pressure tie rods 2003 are provided. The number and position of high-pressure connection holes 2004 and second connection holes 3005 are respectively set to correspond to the high-pressure tie rods 2003. Multiple high-pressure tie rods 2003 are arranged at intervals along the circumference of the pump shaft 5001 so that the circumferential connection force between the high-pressure section 2001 and the inlet / outlet water section 3001 is more uniform, thereby improving the stability of the connection structure between the high-pressure section 2001 and the inlet / outlet water section 3001.

[0060] Furthermore, such as Figures 1 to 3As shown, a low-pressure section 1001 is fitted with a low-pressure cylinder 1012, a first rod 1003 is located inside the low-pressure cylinder 1012, and a medium inlet 1002 is exposed outside the low-pressure cylinder 1012. A high-pressure section 2001 is fitted with a high-pressure cylinder 2011, a second rod 2002 is located inside the high-pressure cylinder 2011, and an inlet / outlet section 3001 is located between the low-pressure cylinder 1012 and the high-pressure cylinder 2011. One end of the low-pressure cylinder 1012 is connected to the inlet section 1007, and the other end is connected to the inlet / outlet section 3001. One end of the high-pressure cylinder 2011 is connected to the secondary inlet section 2006, and the other end is connected to the inlet / outlet section 3001. A transition bend 4001 is located on the outer periphery of the high-pressure cylinder 2011. In the high-pressure stabilizing pump structure, the low-pressure cylinder 1012 and the high-pressure cylinder 2011 are respectively fitted outside the low-pressure section 1001 and the high-pressure section 2001, and connected by the inlet and outlet sections 3001. They also work in conjunction with the first rod 1003, the second rod 2002, and the transition bend 4001 to form an integral structure. The low-pressure cylinder 1012 encloses the low-pressure section 1001, and the high-pressure cylinder 2011 encloses the high-pressure section 2001, allowing different pressure zones to be independently encapsulated and avoiding interference between high and low pressures. As a pressure-bearing outer shell, the cylinder can withstand the internal fluid pressure, reducing the risk of pump deformation. The cylinder, together with the first rod 1003 and the second rod 2002, forms a composite support structure, improving overall rigidity and reducing vibration and noise during operation.

[0061] As one embodiment, such as Figures 1 to 3 As shown, one end of the low-pressure cylinder 1012 is connected to the side of the inlet section 1007 facing the inlet / outlet section 3001, and the other end is connected to the inlet / outlet section 3001. One section of the high-pressure cylinder 2011 is connected to the side of the secondary inlet section 2006 facing the inlet / outlet section 3001, and the other end is connected to the inlet / outlet section 3001.

[0062] In summary, this embodiment of the invention provides a high-pressure stabilizing pump. A low-pressure section 1001, a high-pressure section 2001, and an inlet / outlet section 3001 are coaxially connected to a pump shaft 5001. Water requiring pressurization enters through the medium inlet 1002 of the low-pressure section 1001 and is pressurized sequentially in the low-pressure flow channel of the low-pressure section 1001 and the high-pressure flow channel of the high-pressure section 2001 to form a high-pressure medium. The high-pressure medium flows out through the medium outlet 3002 of the inlet / outlet section 3001. The low-pressure section 1001 is connected to the inlet / outlet section 3001 via a first rod 1003 to form a first assembly. The high-pressure section 2001 is connected to the inlet / outlet section 3001 via a second rod 2002 to form a second assembly. This design controls the cumulative error of each assembly within a local range, avoiding error aggregation. The first rod 1003 and the second rod 2002 extend in the same direction as the pump shaft 5001. The first rod 1003 and the second rod 2002 form a symmetrical double-support positioning structure in the direction of the pump shaft 5001. Combined with the central constraint of the pump shaft 5001 itself, a three-point positioning structure is formed. This ensures that the relative axial positions of the low-pressure section 1001, the high-pressure section 2001, and the inlet and outlet water sections 3001 are directly controlled by the first rod 1003 and the second rod 2002, avoiding offsets caused by assembly errors and improving assembly positioning accuracy. The inlet / outlet section 3001 is located between the low-pressure section 1001 and the high-pressure section 2001. As an intermediate reference component, the inlet / outlet section 3001 is fixed first during assembly. Then, it is connected to the low-pressure section 1001 via the first rod 1003 and to the high-pressure section 2001 via the second rod 2002. This assembly logic, using the middle section to define both ends, reduces the difficulty of step-by-step alignment in traditional multistage pumps and ensures the coaxiality of the low-pressure section 1001, high-pressure section 2001, and inlet / outlet section 3001. Precise positioning and fitting of the low-pressure section 1001, high-pressure section 2001, and inlet / outlet section 3001 ensures concentricity during assembly and operation. During multistage centrifugal pump operation, the impellers within the low-pressure section 1001 and high-pressure section 2001 generate axial forces. The low-pressure section 1001 and the high-pressure section 2001 are rigidly connected to the inlet and outlet water section 3001 by the first rod 1003 and the second rod 2002, so that the axial force is transmitted to the inlet and outlet water section 3001, avoiding the force concentration on the pump shaft 5001, reducing vibration and wear, and ensuring the reliable and safe operation of the multi-stage pump.

[0063] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A high-pressure stabilizing pump, characterized in that: It includes a low-pressure section, a high-pressure section, an inlet / outlet water section, a transition bend, and a pump shaft. The pump shaft is coaxially installed in the low-pressure section, the inlet / outlet water section, and the high-pressure section. The inlet / outlet water section is located between the low-pressure section and the high-pressure section. The low-pressure section has a medium inlet, and the inlet / outlet water section has a medium outlet. The low-pressure section is connected to one end of the transition bend through the inlet / outlet water section. The other end of the transition bend is connected to the end of the high-pressure section away from the inlet / outlet water section. The high-pressure section is connected to the medium outlet. The low-pressure section is provided with a first rod, and the high-pressure section is provided with a second rod. The first rod and the second rod extend in the same direction as the pump shaft. The low-pressure section is connected to the inlet and outlet water sections through the first rod, and the high-pressure section is connected to the inlet and outlet water sections through the second rod.

2. The high-pressure stabilizing pump according to claim 1, characterized in that: The first rod includes a low-pressure tie rod. The outer periphery of the low-pressure section is provided with a low-pressure connection hole. The inlet and outlet sections are provided with a first connection hole facing the outer periphery of the low-pressure section. One end of the low-pressure tie rod is connected to the low-pressure connection hole, and the other end is connected to the first connection hole.

3. The high-pressure stabilizing pump according to claim 2, characterized in that: Multiple low-pressure tie rods are provided, and the number and position of the low-pressure connection holes and the first connection holes are respectively provided corresponding to the low-pressure tie rods. The multiple low-pressure tie rods are arranged at intervals along the circumference of the pump shaft.

4. The high-pressure stabilizing pump according to claim 2, characterized in that: The first rod body includes a low-pressure stabilizing rod with a polygonal outer periphery. The low-pressure section includes an inlet section and a low-pressure middle section connected to the pump shaft. The medium inlet and the low-pressure connection hole are located in the inlet section. The inlet section is connected to the inlet and outlet sections through the low-pressure middle section to form a low-pressure cavity. The outer periphery of the inlet section is provided with a first stabilizing hole, the outer periphery of the low-pressure middle section is provided with a second stabilizing hole, and the side of the inlet and outlet sections facing the low-pressure section is provided with a third stabilizing hole. The shapes of the first stabilizing hole, the second stabilizing hole, and the third stabilizing hole correspond to the outer periphery shape and position of the low-pressure stabilizing rod. The low-pressure stabilizing rod passes through the second stabilizing hole, and both ends of the low-pressure stabilizing rod are connected to the first stabilizing hole and the second stabilizing hole, respectively.

5. The high-pressure stabilizing pump according to claim 4, characterized in that: The first stabilizing hole is located at the upper end of the water inlet section, the second stabilizing hole is located at the upper end of the low-pressure intermediate section, and the third stabilizing hole is connected to the upper end of the water inlet and outlet sections.

6. The high-pressure stabilizing pump according to claim 1, characterized in that: The second rod includes a high-pressure pull rod. The outer periphery of the high-pressure section is provided with a high-pressure connection hole. The inlet and outlet sections are provided with a second connection hole facing the outer periphery of the high-pressure section. One end of the high-pressure pull rod is connected to the high-pressure connection hole, and the other end is connected to the second connection hole.

7. The high-pressure stabilizing pump according to claim 6, characterized in that: The second rod body includes a high-pressure stabilizing rod with a polygonal outer periphery. The high-pressure section includes a secondary inlet section and a high-pressure intermediate section, which are respectively connected to the pump shaft. The high-pressure connecting hole is opened in the secondary inlet section. The secondary inlet section is connected to the inlet and outlet sections through the high-pressure intermediate section to form a high-pressure cavity. A fourth stabilizing hole is provided on the outer periphery of the secondary inlet section. A fifth stabilizing hole is provided on the outer periphery of the high-pressure intermediate section. A sixth stabilizing hole is provided on the side of the inlet and outlet sections facing the high-pressure section. The shapes of the fourth, fifth, and sixth stabilizing holes correspond to the outer periphery shape and position of the high-pressure stabilizing rod. The high-pressure stabilizing rod passes through the fifth stabilizing hole, and its two ends are respectively connected to the fourth and sixth stabilizing holes.

8. The high-pressure stabilizing pump according to claim 7, characterized in that: The fourth stabilizing hole is located at the upper end of the secondary water inlet section, the fifth stabilizing hole is located at the upper end of the high-pressure intermediate section, and the sixth stabilizing hole is connected to the upper end of the water inlet and outlet sections.

9. The high-pressure stabilizing pump according to claim 6, characterized in that: Multiple high-pressure tie rods are provided, and the number and position of the high-pressure connection holes and the second connection holes are respectively provided corresponding to the high-pressure tie rods. The multiple high-pressure tie rods are arranged at intervals along the circumference of the pump shaft.

10. The high-pressure stabilizing pump according to claim 1, characterized in that: The low-pressure section is fitted with a low-pressure cylinder, the first rod is located inside the low-pressure cylinder, and the medium inlet is exposed outside the low-pressure cylinder. The high-pressure section is fitted with a high-pressure cylinder, the second rod is located inside the high-pressure cylinder, and the inlet / outlet water section is located between the low-pressure cylinder and the high-pressure cylinder. One end of the low-pressure cylinder and one end of the high-pressure cylinder are respectively connected to the inlet / outlet water section, and the transition bend is located on the outer periphery of the high-pressure cylinder.

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