Vertical rotary shell pump with jacket cooling function

Abstract

The utility model discloses a vertical rotating shell pump with a jacket cooling function. The vertical rotating shell pump comprises a pump body, a pump cover, a mechanical sealing assembly, an impeller structure, a liquid collecting pipe and a bearing box. The jacket cooling piece is arranged on the bearing box and is used for cooling the bearing box; the jacket cooling piece comprises an inner jacket connected to the bearing box, and a third inner cavity is formed between the inner jacket and the bearing box; the cooling water inlet is connected to the bearing box, communicates with the third inner cavity and is used for guiding cooling water into the third inner cavity; the cooling water outlet is connected to the bearing box, communicates with the third inner cavity, is spaced from the cooling water inlet and is used for discharging cooling water in the third inner cavity; therefore, the technical problem that the bearing is easy to damage due to fluid heat conduction or high-temperature conduction generated by bearing operation during operation is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a vertical volute pump with jacket cooling. Background Art

[0002] The rotary casing pump, also known as the rotary jet pump or the pitot tube pump, is a small-flow, high-pressure pump with broad application prospects in the chemical, metallurgical, food, papermaking, printing and dyeing industries. It is used to transport liquid media such as water, oil, acid and alkali solutions.

[0003] Since the volute pump is in a high-speed operation state for a long time (for example, the speed is 2950 rpm-4858 rpm), the heat transfer of the high-temperature medium (the high temperature is about 100°C) and the contact friction between the parts can easily cause temperature rise. For example, the bearings on the bearing box (the heat generated by the bearing's own operation cannot be quickly dissipated) and the mechanical seals. Long-term high temperature will cause damage to the bearings and mechanical seals, affecting the normal operation of the volute pump.

[0004] Therefore, a vertical volute pump with jacket cooling is needed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the related art, the purpose is to provide a vertical volute pump with jacket cooling to solve the technical problem in the related art that high temperature is generated at the bearing during operation, which easily causes bearing damage.

[0006] The technical solution to achieve the purpose is: a vertical volute pump with jacket cooling, comprising: a pump body, a pump cover, a mechanical seal assembly, an impeller structure, a liquid collecting pipe and a bearing box; and further comprising: a jacket cooling member disposed on the bearing box for cooling the bearing box;

[0007] The jacket cooling member includes: an inner jacket, connected to the bearing housing, and having a third inner cavity between the inner jacket and the bearing housing; a cooling water inlet, connected to the bearing housing, communicating with the third inner cavity, and used to introduce cooling water into the third inner cavity; and a cooling water outlet, connected to the bearing housing, communicating with the third inner cavity, and spaced apart from the cooling water inlet, and used to discharge cooling water in the third inner cavity.

[0008] Furthermore: the pump body has a first inner cavity, a liquid inlet and a liquid outlet, the liquid inlet is communicated with the first inner cavity, the liquid outlet is communicated with the first inner cavity, and the liquid inlet and the liquid outlet are spaced apart;

[0009] The pump cover is connected to the top of the pump body, and a first stepped through hole is provided in the middle of the pump cover, and the first stepped through hole is aligned and communicated with the first inner cavity;

[0010] The mechanical seal assembly is connected between the pump cover and the pump body, one end of the mechanical seal assembly is arranged in the first inner cavity, and the other end protrudes from the first stepped through hole;

[0011] One end of the impeller structure is connected to the other end of the mechanical seal assembly and is spaced apart from the pump cover;

[0012] One end of the collecting pipe is connected to the pump body and communicated with the liquid outlet, a space is defined between the middle portion and the mechanical seal assembly, and the other end extends into the impeller structure, the space is communicated with the liquid inlet, and the space is communicated with the impeller structure;

[0013] The bearing box is connected to the pump cover and the pump body, surrounds the impeller structure, and is connected to the other end of the impeller structure to rotate in conjunction with the impeller structure.

[0014] Further: the mechanical seal assembly includes: a mechanical seal, disposed in the first inner cavity;

[0015] a sealing support seat connected to the pump cover, with a portion disposed between the pump body and the pump cover and another portion disposed in the first inner cavity, for connecting to a fixed ring on the mechanical seal;

[0016] And an inner sleeve, one end of which is arranged in the first inner cavity and the other end protrudes from the first stepped through hole, is connected to the impeller structure and is used to connect to the dynamic ring on the mechanical seal, and there is the spacing space between the inner sleeve and the collecting pipe.

[0017] Furthermore, the impeller structure includes: a lower cover body connected to the inner sleeve, and having a second stepped through hole in the middle of the lower cover body, the second stepped through hole communicating with the interval space, the second stepped through hole penetrating the liquid collecting pipe; and an upper cover body connected to the lower cover body and connected to the bearing box, and having a second inner cavity between the upper cover body and the lower cover body, the second inner cavity accommodating the other end of the liquid collecting pipe;

[0018] The lower cover body also has a flow channel and a plurality of blades, and the flow channel is connected with the second stepped through hole, the separation space and the second inner cavity;

[0019] The blades are evenly distributed in the flow channel.

[0020] Furthermore: the liquid collecting pipe includes: a first pipe section, one end of which is connected to the pump body and the other end extends to the second stepped through hole; and a second pipe section, which is connected to the other end of the first pipe section and is arranged in the second inner cavity.

[0021] Furthermore, the diameter of the second pipe section gradually decreases from the connection point with the first pipe section to the direction away from the first pipe section.

[0022] Furthermore: the bearing box includes: a box body, one end of which is connected to the pump cover and the pump body, surrounds the impeller structure, and is spaced apart from the impeller structure;

[0023] a first bearing portion, connected to a middle position of the housing and spaced apart from the impeller structure;

[0024] a second bearing portion connected to the other end of the first bearing portion and spaced apart from the first bearing portion;

[0025] And a central shaft is connected to the first bearing part and the second bearing part, one end of the central shaft protrudes from the first bearing part and is connected to the impeller structure, and the other end of the central shaft protrudes from the second bearing part and is connected to the motor.

[0026] Further: the casing includes: a first flange, connecting the pump cover and the pump body; a second flange, spaced apart from the first flange, connected to the second bearing part; a first intermediate connection, connecting the first flange and the second flange, connecting the cooling water inlet and the cooling water outlet, and having the third inner cavity between the first intermediate connection and the inner jacket; at least two second intermediate connections, spaced apart, connecting the first flange, the second flange and the first intermediate connection; and a first bearing chamber, connected in the first intermediate connection, arranged between the first flange and the second flange, and the inner jacket is connected between the first bearing chamber and the first flange.

[0027] Further: the first bearing part includes: a first bearing, arranged in the first bearing chamber, connected to the center shaft; a spacer ring, sleeved on the center shaft, arranged in the first bearing chamber, and in contact with the first bearing; a first locking nut, connected to the center shaft, pressing the spacer ring; and a first pressure cover, connected to the first bearing chamber, surrounding the center shaft, spaced apart from the center shaft, and pressing the first bearing.

[0028] Further: the second bearing part includes: a second bearing chamber, connected to the first flange; a second bearing, arranged in the second bearing chamber, connected to the center shaft; a second locking nut, connected to the center shaft, pressing the second bearing; and a second pressure cover, connected to the second bearing chamber, surrounding the center shaft, and spaced apart from the center shaft to press the second bearing.

[0029] Further: the jacket cooling part includes: an inner jacket, connected between the first flange and the first bearing chamber, and having a third inner cavity between the inner jacket and the first intermediate connection; a cooling water inlet, connected to the first intermediate connection, communicating with the third inner cavity, and used to introduce cooling water into the third inner cavity; and a cooling water outlet, connected to the first intermediate connection, communicating with the third inner cavity, and spaced apart from the cooling water inlet, and used to discharge cooling water in the third inner cavity.

[0030] The above technical solution has the following beneficial effects: a vertical volute pump with jacket cooling, compared with the related art, is provided with a pump body, a pump cover, a mechanical seal assembly, an impeller structure, a liquid collecting pipe, a bearing box and a jacket cooling member;

[0031] The jacket cooling member includes: an inner jacket connected to the bearing housing and having a third inner cavity between the inner jacket and the bearing housing; a cooling water inlet connected to the bearing housing and communicating with the third inner cavity, for introducing cooling water into the third inner cavity; and a cooling water outlet connected to the bearing housing and communicating with the third inner cavity, spaced apart from the cooling water inlet, for discharging cooling water from the third inner cavity.

[0032] Cooling water is introduced from the cooling water inlet, enters the third inner cavity, and is discharged from the cooling water outlet. When the cooling water circulates, it takes away the heat from the bearing box, thereby achieving the purpose of cooling the bearing box and reducing the probability of bearing damage on the bearing box;

[0033] This overcomes the technical problem that high temperature will be generated at the bearing during operation, which will easily cause bearing damage. It achieves the technical effect of being able to cool the bearing and reduce the probability of bearing damage, and is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the assembly cross-sectional view;

[0035] Figure 2 for Figure 1 A partial cross-sectional view with the bearing housing and jacket cooling removed;

[0036] Figure 3 It is a partial cross-sectional view of the impeller structure and the collecting pipe;

[0037] Figure 4 It is a partial cross-sectional view of the bearing housing and the jacket cooling member;

[0038] Figure 5 It is a partial cross-sectional view of the box;

[0039] In the figure: 10. Pump body, 11. First inner cavity, 12. Liquid inlet, 13. Liquid outlet, 20. Pump cover, 21. First stepped through hole, 30. Mechanical seal assembly, 31. Mechanical seal, 32. Seal support seat, 33. Inner sleeve, 40. Impeller structure, 41. Lower cover, 41-1. Second stepped through hole, 41-2. Flow channel, 41-3. Blades, 42. Upper cover, 43. Second inner cavity, 50. Collecting pipe, 50-1. Spacing space, 51. First pipe section, 52. Second pipe section, 60. Bearing box, 61. Box, 61-1. First flange, 6 1-2. Second flange, 61-3. First intermediate connection, 61-4. Second intermediate connection, 61-5. First bearing chamber, 62. First bearing part, 62-1. First bearing, 62-2. Spacer ring, 62-3. First locking nut, 62-4. First pressure cover, 63. Second bearing part, 63-1. Second bearing chamber, 63-2. Second bearing, 63-3. Second locking nut, 63-4. Second pressure cover, 64. Center shaft, 70. Jacket cooling part, 71. Inner jacket, 71-1. Third inner cavity, 72. Cooling water inlet, 73. Cooling water outlet. DETAILED DESCRIPTION

[0040] In order to make the content easier to understand, the following is a further detailed description based on specific embodiments and in conjunction with the accompanying drawings;

[0041] A vertical volute pump with jacket cooling solves the technical problem in related technologies that high temperatures are generated at the bearings during operation, which easily leads to bearing damage. It can be manufactured and used, achieving the positive effect of cooling the bearings and reducing the probability of bearing damage. The overall idea is as follows:

[0042] Implementation Method

[0043] like Figure 1 、 Figure 4 As shown; A vertical volute pump with jacket cooling, comprising: a pump body 10, a pump cover 20, a mechanical seal assembly 30, an impeller structure 40, a liquid collecting pipe 50 and a bearing box 60; further comprising: a jacket cooling member 70, disposed on the bearing box 60, for cooling the bearing box 60;

[0044] The jacket cooling member 70 includes: an inner jacket 71, connected to the bearing box 60, and having a third inner cavity 71-1 between the inner jacket 71 and the bearing box 60; a cooling water inlet 72, connected to the bearing box 60, communicating with the third inner cavity 71-1, and used to introduce cooling water into the third inner cavity 71-1; and a cooling water outlet 73, connected to the bearing box 60, communicating with the third inner cavity 71-1, and spaced apart from the cooling water inlet 72, and used to discharge the cooling water in the third inner cavity 71-1.

[0045] Specifically, during implementation, cooling water is introduced from the cooling water inlet 72, enters the third inner cavity 71-1, and is discharged from the cooling water outlet 73. When the cooling water circulates, it takes away the heat from the bearing box 60, thereby achieving the purpose of cooling the bearing box 60 and reducing the probability of damage to the bearings on the bearing box 60.

[0046] Another embodiment:

[0047] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown; the pump body 10 has a first inner cavity 11, a liquid inlet 12 and a liquid outlet 13, the liquid inlet 12 is connected to the first inner cavity 11, the liquid outlet 13 is connected to the first inner cavity 11, and the liquid inlet 12 and the liquid outlet 13 are spaced apart;

[0048] The pump cover 20 is connected to the top of the pump body 10. The middle position of the pump cover 20 has a first stepped through hole 21. The first stepped through hole 21 is aligned and communicated with the first inner cavity 11.

[0049] The mechanical seal assembly 30 is connected between the pump cover 20 and the pump body 10 , with one end of the mechanical seal assembly 30 disposed in the first inner cavity 11 and the other end protruding from the first stepped through hole 21 ;

[0050] One end of the impeller structure 40 is connected to the other end of the mechanical seal assembly 30 and is spaced apart from the pump cover 20;

[0051] One end of the collecting pipe 50 is connected to the pump body 10 and communicates with the liquid outlet 13. A space 50-1 is defined between the middle portion and the mechanical seal assembly 30. The other end of the collecting pipe 50 extends into the impeller structure 40. The space 50-1 communicates with the liquid inlet 12 and the impeller structure 40.

[0052] The bearing housing 60 is connected to the pump cover 20 and the pump body 10, surrounds the impeller structure 40, and is connected to the other end of the impeller structure 40, so as to rotate in conjunction with the impeller structure 40;

[0053] During operation, a portion of the bearing housing 60 is driven to rotate by the motor, which in turn rotates a portion of the mechanical seal assembly 30 and the impeller structure 40. The medium enters the pump body 10 through the liquid inlet 12, flows through the first inner cavity 11 and the space 50-1, and enters the impeller structure 40. The medium is pressurized by the impeller structure 40, and the flow rate of the medium is accelerated. The medium enters the liquid collecting pipe 50 and is discharged through the liquid outlet 13 on the pump body 10.

[0054] Since the mechanical seal assembly 30 is connected between the pump cover 20 and the pump body 10, one end of the mechanical seal assembly 30 is arranged in the first inner cavity 11, and the other end protrudes from the first stepped through hole 21 on the pump cover 20; when the medium enters the impeller structure 40 along the first inner cavity 11 and the spacing space 50-1, the mechanical seal assembly 30 is in direct contact with the medium. The circulating medium can take away the heat from the mechanical seal assembly 30, cool the mechanical seal assembly 30, and reduce the probability of mechanical seal damage;

[0055] Another embodiment:

[0056] like Figure 1 、 Figure 2 As shown; during implementation, the pump body 10 is provided with a first inner cavity 11, which is conducive to accommodating the mechanical seal assembly 30, so that the mechanical seal assembly 30 is in direct contact with the medium. The circulating medium can take away the heat at the mechanical seal assembly 30, cool the mechanical seal assembly 30, and reduce the probability of mechanical seal damage;

[0057] A liquid inlet 12 is provided to facilitate the entry of the medium; a liquid outlet 13 is provided to facilitate the discharge of the medium;

[0058] The pump body 10 is made of a cast blank and then machined to form a reliable support structure, which is convenient for connecting other components.

[0059] Another embodiment:

[0060] like Figure 1 、 Figure 2 As shown; when implemented, the pump cover 20 is projected from top to bottom, and has a circular ring structure, which is connected to the pump body 10 and the bearing box 60 by bolts, and is easy to install and disassemble;

[0061] The pump cover 20 is provided to facilitate the connection and positioning of the mechanical seal assembly 30 and the bearing housing 60, and the structural reliability is relatively good;

[0062] Another embodiment:

[0063] like Figure 1 、 Figure 2As shown; in implementation, the mechanical seal assembly 30 includes: a mechanical seal 31, disposed in the first inner cavity 11; a seal support seat 32, connected to the pump cover 20, with a portion disposed between the pump body 10 and the pump cover 20 and the other portion disposed in the first inner cavity 11, for connecting to the fixed ring on the mechanical seal 31; and an inner sleeve 33, one end of which is disposed in the first inner cavity 11, the other end protruding from the first stepped through hole 21, connected to the impeller structure 40, for connecting to the dynamic ring on the mechanical seal 31, and a spacing space 50-1 is defined between the inner sleeve 33 and the liquid collecting pipe 50;

[0064] The mechanical seal 31 is a common structure in the prior art, such as a single-end mechanical seal (including a fixed ring and a dynamic ring), which is used to form a seal to prevent the medium from leaking from the first inner cavity 11 along the first stepped through hole 21;

[0065] The sealing support seat 32 is connected to the pump cover 20 by passing bolts, and a sealing gasket is provided between the sealing support seat 32 and the pump body 10, which not only ensures the sealing of the connection with the pump body 10, but also facilitates the positioning of the fixed ring on the mechanical seal 31;

[0066] The sealing support seat 32 and the fixed ring are in a fixed state. When the inner sleeve 33 and the dynamic ring rotate, there is a sealing surface between the fixed ring and the dynamic ring, which ensures the sealing performance.

[0067] Bolts are inserted between the inner sleeve 33 and the impeller structure 40 to connect the dynamic ring on the mechanical seal 31. The inner sleeve 33 and the dynamic ring rotate together with the impeller structure 40.

[0068] A mechanical seal assembly 30 is provided to ensure sealing performance, and the mechanical seal 31 is in direct contact with the medium. The circulating medium can take away the heat from the mechanical seal 31, cooling the mechanical seal 31 and reducing the probability of damage to the mechanical seal 31.

[0069] Another embodiment:

[0070] like Figure 1 、 Figure 2 、 Figure 3 As shown; in implementation, the impeller structure 40 includes: a lower cover body 41, connected to the inner sleeve 33, and having a second stepped through hole 41-1 in the middle position of the lower cover body 41, the second stepped through hole 41-1 being connected to the interval space 50-1, and the second stepped through hole 41-1 passing through the collecting pipe 50; and an upper cover body 42, connected to the lower cover body 41, connected to the bearing box 60, and having a second inner cavity 43 between the upper cover body 42 and the lower cover body 41, the second inner cavity 43 accommodating the other end of the collecting pipe 50;

[0071] A sealing gasket is placed between the lower cover 41 and the inner sleeve 33 and then bolted together. A sealing gasket is placed between the lower cover 41 and the upper cover 42 and then bolted together. The formed second inner cavity 43 is conducive to accommodating the medium, allowing the medium to smoothly enter the liquid collecting pipe 50, thereby reducing the probability of medium interruption.

[0072] The lower cover 41 further comprises a flow channel 41-2 and a plurality of blades 41-3. The flow channel 41-2 communicates with the second stepped through hole 41-1, the space 50-1, and the second inner cavity 43. The blades 41-3 are evenly distributed within the flow channel 41-2. When the impeller structure 40 rotates, the blades 41-3 act to create a negative pressure at the second stepped through hole 41-1. The medium flows along the first inner cavity 11 and the space 50-1, enters the second inner cavity 43 through the flow channel 41-2, enters the liquid collecting pipe 50, and is discharged through the liquid outlet 13 on the pump body 10.

[0073] The separate arrangement of the lower cover 41 and the upper cover 42 provides relatively good flexibility during assembly and facilitates assembly of the liquid collecting pipe 50 , making the operation relatively convenient.

[0074] Another embodiment:

[0075] like Figure 1 、 Figure 2 、 Figure 3 As shown; in implementation, the liquid collecting pipe 50 includes: a first pipe section 51, one end of which is plugged into the pump body 10 and the other end extends to the second stepped through hole 41-1; and a second pipe section 52, connected to the other end of the first pipe section 51 and disposed in the second inner cavity 43;

[0076] After the first pipe section 51 and the second pipe section 52 are welded together, the outer shape is roughly an "L"-shaped structure. When the impeller structure 40 rotates, the collecting pipe 50 is in a fixed state;

[0077] The other end of the first tube section 51 extends to the second stepped through hole 41-1. A gap A between the other end and the second stepped through hole 41-1 is 0.1-0.2 mm. Controlling the size of the gap A reduces the amount of medium flowing back from the second inner cavity 43 to the second stepped through hole 41-1, thereby facilitating smooth flow of the medium.

[0078] The diameter of the second pipe section 52 gradually decreases from the connection with the first pipe section 51 toward the direction away from the first pipe section 51. The medium enters from the small diameter, which reduces the probability of the medium flowing back into the second inner cavity 43. The medium flows along the liquid collecting pipe 50 and is discharged from the liquid outlet 13, so the flow is relatively smooth.

[0079] Another embodiment:

[0080] like Figure 1 、 Figure 4 、 Figure 5 As shown; during implementation, the bearing box 60 includes: a box body 61, one end of which is connected to the pump cover 20 and the pump body 10, surrounds the impeller structure 40, and is spaced apart from the impeller structure 40; a first bearing portion 62, connected to the middle position of the box body 61, and is spaced apart from the impeller structure 40; a second bearing portion 63, connected to the other end of the first bearing portion 62, and is spaced apart from the first bearing portion 62; and a central shaft 64, connected to the first bearing portion 62 and the second bearing portion 63, one end of the central shaft 64 protrudes from the first bearing portion 62 and is connected to the impeller structure 40, and the other end of the central shaft 64 protrudes from the second bearing portion 63 and is connected to the motor;

[0081] Wherein, the casing 61 includes: a first flange 61-1, connecting the pump cover 20 and the pump body 10; a second flange 61-2, spaced apart from the first flange 61-1, connected to the second bearing portion 63; a first intermediate connection 61-3, connecting the first flange 61-1 and the second flange 61-2, connecting the cooling water inlet 72 and the cooling water outlet 73, and having the third inner cavity 71-1 between the first intermediate connection 61-3 and the inner jacket 71; at least two second intermediate connections 61-4, spaced apart, connecting the first flange 61-1, the second flange 61-2 and the first intermediate connection 61-3; and a first bearing chamber 61-5, connected in the first intermediate connection 61-3, disposed between the first flange 61-1 and the second flange 61-2, and the inner jacket 71 is connected between the first bearing chamber 61-5 and the first flange 61-1;

[0082] The first intermediate connection 61-3 is a cylindrical structure; the second intermediate connection 61-4 is a plate-shaped structure, which has the function of improving structural strength; the middle position of the first bearing chamber 61-5 has a through hole, and the first bearing 62-1 and the spacer ring 62-2 are arranged in the through hole;

[0083] The first flange 61-1, the second flange 61-2, the first intermediate connection 61-3, the second intermediate connection 61-4 and the first bearing chamber 61-5 are welded together, or integrally cast into a blank and then machined;

[0084] Through the first flange 61-1, the pump cover 20 and the pump body 10 are connected by bolts, which makes installation and disassembly more convenient;

[0085] The first bearing portion 62 includes: a first bearing 62-1, disposed in the first bearing chamber 61-5 and connected to the central shaft 64; a spacer ring 62-2, sleeved on the central shaft 64, disposed in the first bearing chamber 61-5, and in contact with the first bearing 62-1; a first locking nut 62-3, connected to the central shaft 64, pressing the spacer ring 62-2; and a first pressure cover 62-4, connected to the first bearing chamber 61-5, surrounding the central shaft 64, spaced from the central shaft 64, and pressing the first bearing 62-1.

[0086] The first bearing 62-1 is a common structure in the prior art, such as a cylindrical roller bearing, a deep groove ball bearing, etc., connected to the through hole on the first bearing chamber 61-5, and used to connect and support the central shaft 64;

[0087] The spacer ring 62-2 is a ring-shaped structure used to limit the first bearing 62-1;

[0088] The first locking nut 62 - 3 is a common structure in the prior art, and is threadedly connected to the central shaft 64 , pressing the spacer ring 62 - 2 , and limiting the inner ring of the first bearing 62 - 1 ;

[0089] Bolts are inserted between the first gland 62-4 and the first bearing chamber 61-5 to limit the outer ring of the first bearing 62-1;

[0090] The second bearing portion 63 includes: a second bearing chamber 63-1 connected to the first flange 61-1; a second bearing 63-2 disposed in the second bearing chamber 63-1 and connected to the central shaft 64; a second locking nut 63-3 connected to the central shaft 64 to press the second bearing 63-2; and a second pressure cover 63-4 connected to the second bearing chamber 63-1, surrounding the central shaft 64, spaced apart from the central shaft 64, and pressing the second bearing 63-2.

[0091] The second bearing chamber 63-1 is T-shaped and is connected to the first flange 61-1 by bolts. A third stepped through hole is formed in the middle of the second bearing chamber 63-1 to accommodate the second bearing 63-2.

[0092] The second bearing 63-2 is a common structure in the prior art, such as two single-row angular contact ball bearings mounted back to back, connected to the third stepped through hole on the second bearing chamber 63-1, for connecting to the supporting central shaft 64;

[0093] The second locking nut 63-3 is a common structure in the prior art, and is threadedly connected to the central shaft 64 to limit the inner ring of the second bearing 63-2;

[0094] Bolts are inserted between the second gland 63-4 and the second bearing chamber 63-1 to limit the outer ring of the second bearing 63-2;

[0095] The central shaft 64 is a stepped shaft, one end of which is connected to the upper cover 42 by a bolt, and the other end is connected to the transmission shaft on the motor by a coupling. When the motor is actuated, the central shaft 64 rotates, thereby rotating the impeller structure 40, thereby pressurizing and conveying the medium.

[0096] The bearing housing 60 is provided to improve the reliability of the structure, so that the central shaft 64 and the impeller structure 40 rotate in a relatively stable manner;

[0097] Another embodiment:

[0098] like Figure 1 、 Figure 4 As shown; in implementation, the jacket cooling member 70 includes: an inner jacket 71, connected between the first flange 61-1 and the first bearing chamber 61-5, and having a third inner cavity 71-1 between the inner jacket 71 and the first intermediate connection 61-3; a cooling water inlet 72, connected to the first intermediate connection 61-3, communicating with the third inner cavity 71-1, and used to introduce cooling water into the third inner cavity 71-1; and a cooling water outlet 73, connected to the first intermediate connection 61-3, communicating with the third inner cavity 71-1, and spaced apart from the cooling water inlet 72, and used to discharge cooling water in the third inner cavity 71-1;

[0099] The inner jacket 71 is a cylindrical structure; the cooling water inlet 72 is a section of a circular tube; the cooling water outlet 73 is a section of a circular tube; cooling water (e.g., tap water) is introduced through the cooling water inlet 72, enters the third inner cavity 71-1, and is discharged through the cooling water outlet 73. When the cooling water circulates, it takes away the heat from the bearing box 60, thereby achieving the purpose of cooling the bearing box 60 and reducing the probability of bearing damage.

[0100] The working principle is as follows: cooling water is introduced through the cooling water inlet 72, enters the third inner cavity 71-1, and is discharged from the cooling water outlet 73. When the cooling water circulates, it takes away the heat from the bearing box 60, thereby achieving the purpose of cooling the bearing box 60 and reducing the probability of bearing damage on the bearing box 60;

[0101] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the positional relationships shown in the drawings and are only used to facilitate or simplify the description, and do not necessarily indicate specific directions. The operating procedures described in the embodiments are not absolute steps for use and may be adjusted accordingly in actual use.

[0102] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the relevant art. The terms "first," "second," and similar words used in the specification and claims do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "an" and similar words do not necessarily indicate a limit on quantity, but rather indicate the presence of at least one, which shall be determined based on the content of the embodiments.

[0103] The above is only a preferred specific implementation method, but the scope of protection is not limited to this. Any technician familiar with this technical field can make equivalent replacements or changes based on the technical solutions and inventive concepts within the disclosed technical scope, which should be covered by the scope of protection.

Claims

1. A vertical volute pump with jacket cooling, comprising: The pump body, pump cover, mechanical seal assembly, impeller structure, liquid collecting pipe and bearing box are characterized in that the pump body further comprises: a jacket cooling member provided on the bearing box for cooling the bearing box; The jacket cooling member includes: an inner jacket, connected to the bearing housing, and having a third inner cavity between the inner jacket and the bearing housing; a cooling water inlet, connected to the bearing housing, communicating with the third inner cavity, and used to introduce cooling water into the third inner cavity; and a cooling water outlet, connected to the bearing housing, communicating with the third inner cavity, and spaced apart from the cooling water inlet, and used to discharge cooling water in the third inner cavity.

2. A vertical volute pump with jacket cooling according to claim 1, characterized in that: The pump body has a first inner cavity, a liquid inlet and a liquid outlet, the liquid inlet is connected to the first inner cavity, the liquid outlet is connected to the first inner cavity, and the liquid inlet and the liquid outlet are spaced apart; The pump cover is connected to the top of the pump body, and a first stepped through hole is provided in the middle of the pump cover, and the first stepped through hole is aligned and communicated with the first inner cavity; The mechanical seal assembly is connected between the pump cover and the pump body, one end of the mechanical seal assembly is arranged in the first inner cavity, and the other end protrudes from the first stepped through hole; One end of the impeller structure is connected to the other end of the mechanical seal assembly and is spaced apart from the pump cover; One end of the collecting pipe is connected to the pump body and communicated with the liquid outlet, a space is defined between the middle portion and the mechanical seal assembly, and the other end extends into the impeller structure, the space is communicated with the liquid inlet, and the space is communicated with the impeller structure; The bearing box is connected to the pump cover and the pump body, surrounds the impeller structure, and is connected to the other end of the impeller structure to rotate in conjunction with the impeller structure.

3. A vertical volute pump with jacket cooling according to claim 2, characterized in that: The mechanical seal assembly includes: a mechanical seal disposed in the first inner cavity; a sealing support seat connected to the pump cover, with a portion disposed between the pump body and the pump cover and another portion disposed in the first inner cavity, for connecting to a fixed ring on the mechanical seal; And an inner sleeve, one end of which is arranged in the first inner cavity and the other end protrudes from the first stepped through hole, is connected to the impeller structure and is used to connect to the dynamic ring on the mechanical seal, and there is the spacing space between the inner sleeve and the collecting pipe.

4. A vertical volute pump with jacket cooling according to claim 3, characterized in that: The impeller structure includes: a lower cover body connected to the inner sleeve, and having a second stepped through hole in the middle of the lower cover body, the second stepped through hole communicating with the partition space, and the second stepped through hole penetrating the liquid collecting pipe; and an upper cover body connected to the lower cover body and connected to the bearing box, and having a second inner cavity between the upper cover body and the lower cover body, the second inner cavity accommodating the other end of the liquid collecting pipe; The lower cover body also has a flow channel and a plurality of blades, and the flow channel is connected with the second stepped through hole, the separation space and the second inner cavity; The blades are evenly distributed in the flow channel.

5. A vertical volute pump with jacket cooling according to claim 4, characterized in that: The liquid collecting pipe includes: a first pipe section, one end of which is connected to the pump body and the other end of which extends to the second stepped through hole; and a second pipe section, which is connected to the other end of the first pipe section and is arranged in the second inner cavity.

6. A vertical volute pump with jacket cooling according to claim 5, characterized in that: The diameter of the second pipe section gradually decreases from the connection point with the first pipe section toward the direction away from the first pipe section.

7. A vertical volute pump with jacket cooling according to claim 2, characterized in that: The bearing box includes: a box body, one end of which is connected to the pump cover and the pump body, surrounds the impeller structure, and is spaced apart from the impeller structure; a first bearing portion, connected to a middle position of the housing and spaced apart from the impeller structure; a second bearing portion connected to the other end of the first bearing portion and spaced apart from the first bearing portion; And a central shaft is connected to the first bearing part and the second bearing part, one end of the central shaft protrudes from the first bearing part and is connected to the impeller structure, and the other end of the central shaft protrudes from the second bearing part and is connected to the motor.

8. A vertical volute pump with jacket cooling according to claim 7, characterized in that: The casing includes: a first flange connecting the pump cover and the pump body; a second flange spaced apart from the first flange and connected to the second bearing portion; a first intermediate connection connecting the first flange and the second flange, connecting the cooling water inlet and the cooling water outlet, and having the third inner cavity between the first intermediate connection and the inner jacket; at least two second intermediate connections spaced apart and connecting the first flange, the second flange and the first intermediate connection; and a first bearing chamber connected in the first intermediate connection, arranged between the first flange and the second flange, and the inner jacket being connected between the first bearing chamber and the first flange.

9. A vertical volute pump with jacket cooling according to claim 8, characterized in that: The first bearing part includes: a first bearing, which is arranged in the first bearing chamber and connected to the center shaft; a spacer ring, which is sleeved on the center shaft, arranged in the first bearing chamber, and contacts the first bearing; a first locking nut, which is connected to the center shaft and presses the spacer ring; and a first pressure cover, which is connected to the first bearing chamber, surrounds the center shaft, is spaced apart from the center shaft, and presses the first bearing.

10. A vertical volute pump with jacket cooling according to claim 9, characterized in that: The second bearing part includes: a second bearing chamber connected to the first flange; a second bearing arranged in the second bearing chamber and connected to the center shaft; a second locking nut connected to the center shaft to press the second bearing; and a second pressure cover connected to the second bearing chamber, surrounding the center shaft, and spaced apart from the center shaft to press the second bearing.

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