Wear-resistant pump body

Abstract

The utility model relates to a wear-resisting pump body which comprises a pump shell, a pump cover, a pump shaft and an impeller, the pump shaft which is in transmission connection with a rotary driving unit is rotatably arranged in the pump shell in a penetrating mode, and the end, away from the rotary driving unit, of the pump shell is in butt joint with the pump cover which can be matched with the pump shell to form a drainage cavity. The end, arranged in a drainage cavity formed by the pump shell and the pump cover, of the pump shaft is connected with the impeller. An oil seal assembly arranged on the pump shaft in a sleeving mode is further arranged in the pump shell, a bearing box is further arranged between the pump shell and the rotary driving unit, and a heat transfer assembly capable of forming a parallel cooling loop with the bearing box is further arranged on the outer side of the bearing box. According to the bearing box, heat generated in the rotating friction process of the sliding bearing and lubricating oil can be actively transferred through the double heat dissipation flow channels and the active heat transfer structure, so that the working temperature of the bearing box is reduced, and the working performance is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of pump equipment, in particular to a wear-resistant pump body. Background Art

[0002] A pump casing is a mechanical device used to transport or pressurize fluids. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the liquid's energy. Pump casings are commonly used in water conservancy projects, mine rescue operations, industrial cooling, and agricultural irrigation. They can serve as a medium-driven device for transporting liquids such as water, oil, acids and alkalis, emulsions, and liquid metals, as well as liquid-gas mixtures and liquids containing suspended solids. Pump casings are generally categorized by their operating principle into three types: positive displacement pumps, dynamic pumps, and other types. In addition to classification by operating principle, other classifications and nomenclatures can also be used. For example, pumps can be divided into electric pumps and water turbine pumps by drive method; single-stage pumps and multi-stage pumps by structure; boiler feed pumps and metering pumps by application; and water pumps, oil pumps, and slurry pumps by the nature of the fluid being transported. Pumps can also be classified into linear pumps and traditional pumps based on the presence or absence of a shaft. Water pumps can only transport fluids and cannot transport solids.

[0003] During high-speed rotation of existing pump casings, the temperature of the sliding bearings rises rapidly due to the continuous sliding friction between the pump shaft and the bearing housing. To ensure the sliding bearings in the bearing housing can continue to work, the sliding bearings need to be cooled to ensure their working performance. However, existing pump casings usually dissipate heat through natural cooling. The sliding bearings in the bearing housing will rapidly heat up during the mutual friction with the pump shaft. Conventional natural cooling cannot effectively transfer the heat inside the pump casing, which can easily prevent the heat generated by friction from quickly escaping to the external environment. The accumulation of heat in the bearing housing can easily cause the basic structural components of the bearing to overheat and reduce their wear resistance, ultimately leading to overheating and wear damage to the pump casing and reduced wear resistance. Utility Model Content

[0004] The present invention aims to provide a wear-resistant pump body that can actively transfer heat generated by the friction between the sliding bearing and the lubricating oil during rotational friction, thereby reducing the operating temperature of the bearing housing and maintaining operating performance. This invention addresses the problem that the frictional heat generated by existing pump housings during operation can usually only be cooled by natural cooling, resulting in low heat dissipation efficiency, easily leading to overheating and fatigue of internal structural components, reduced wear resistance, and shortened service life. Furthermore, although some pump housings are directly connected to a water cooling system, in order to ensure that the cooling water can effectively absorb the heat within the bearing housing and effectively cool it, the extremely low cooling water is usually directly in contact with the surface of the friction heating element, creating a large temperature difference. This causes the friction heating element to be subjected to simultaneous thermal shock, resulting in thermal fatigue, reduced wear resistance, and shortened service life. Furthermore, this invention can also address the problem that existing cooling structures cannot cool the lubricating oil in the sliding bearing, causing the overheated lubricating oil to easily fail, resulting in increased friction and increased heat generation.

[0005] The technical solution adopted by the present utility model is: a wear-resistant pump body, including a pump casing, a pump cover, a pump shaft and an impeller, the pump shaft which is transmission-connected to a rotary drive unit is rotatably penetrated in the pump casing, and the end of the pump casing away from the rotary drive unit is docked with the pump cover which can cooperate with it to form a drainage cavity, and the end of the pump shaft placed in the drainage cavity formed by the pump casing and the pump cover is connected to the impeller; an oil seal assembly which is sleeved on the pump shaft is also provided in the pump casing, a bearing box is also provided between the pump casing and the rotary drive unit, and a heat transfer assembly which can form a parallel cooling circuit with the bearing box is also provided on the outside of the bearing box.

[0006] According to a preferred embodiment, the bearing box includes a box shell, a sliding bearing inner ring, a sliding bearing outer ring and a first active heat transfer ring sheet, wherein the sliding bearing inner ring is sleeved on the pump shaft, and two sliding bearing outer rings are sleeved on the outside of the sliding bearing inner ring at intervals, and the box shell wraps the sliding bearing inner ring and the sliding bearing outer ring in a manner that limits the axial relative position of the sliding bearing inner ring and the sliding bearing outer ring; the first active heat transfer ring sheet that can dissipate heat is adhered to the outer side surface of the sliding bearing outer ring away from the sliding bearing inner ring.

[0007] According to a preferred embodiment, a first heat dissipation ring cavity and a second heat dissipation ring cavity capable of wrapping the first active heat transfer ring plate are respectively constructed between the box shell and the two sliding bearing outer rings, and a U-shaped flat tube capable of connecting the first heat dissipation ring cavity and the second heat dissipation ring cavity is also inserted on the box shell.

[0008] According to a preferred embodiment, an annular gap is provided between the housing and the inner ring of the sliding bearing and between the two outer rings of the sliding bearing, and the axial ends of the annular gap are connected to the liquid guide gap between the inner ring of the sliding bearing and the outer ring of the sliding bearing.

[0009] According to a preferred embodiment, a plurality of guide grooves are circumferentially spaced apart on the outer surface of the inner ring of the sliding bearing, and a rolling shaft is rotatably passed through the guide groove; the axial ends of the inner ring of the sliding bearing are also connected to positioning ring pieces by positioning screws, and the outer diameter edge of the positioning ring piece is circumferentially spaced apart with positioning baffles corresponding to the guide groove and capable of limiting the position of the rolling shaft in the guide groove.

[0010] According to a preferred embodiment, a liquid guide ring cavity is provided in the housing at the ends of the two sliding bearing outer rings facing away from each other and capable of communicating with the liquid guide gap between the sliding bearing inner ring and the sliding bearing outer ring.

[0011] According to a preferred embodiment, the two liquid-conducting annular cavities are both connected to a suction mechanism located outside the box shell through an L-shaped conduit, thereby forming a lubricating oil circulation loop between the box shell and the suction mechanism.

[0012] According to a preferred embodiment, the suction mechanism includes a suction chamber shell, a second active heat transfer sheet, a piston and a hydraulic drive rod, wherein the second active heat transfer sheet capable of heat transfer of lubricating oil directionally flowing in its inner cavity is embedded on the top surface of the suction chamber shell, and the end surface of the second active heat transfer sheet away from the suction shell cavity is embedded on the U-shaped flat tube; the piston is placed in the suction chamber shell in a manner that can cooperate with the suction chamber shell to form a closed cavity with variable volume; the hydraulic drive rod is inserted into the inner cavity of the suction chamber shell from the open end, and the insertion front end of the hydraulic drive rod is connected to the piston.

[0013] According to a preferred embodiment, the open end of the suction chamber housing and the end of the hydraulic drive rod away from the piston are both connected to the extended positioning plate of the pump housing.

[0014] According to a preferred embodiment, the heat transfer assembly includes a coolant input pipe communicating with the first heat dissipation ring cavity and a coolant output pipe communicating with the second heat dissipation ring cavity.

[0015] The beneficial effects of the utility model are:

[0016] The bearing box provided in the present application can reduce its temperature by providing an active heat transfer module for active heat exchange and cooling of the heating elements or heated lubricating oil, so that the operating temperature of the elements in the bearing box can be maintained in a relatively stable and reasonable temperature range, thereby ensuring the normal operation of the pump body, avoiding overheating damage caused by excessive operating temperature or hot and cold fatigue damage caused by direct contact with low-temperature coolant due to large temperature difference hot and cold shocks, greatly improving the service life and working stability of the bearing box, thereby effectively improving the wear resistance of the sliding friction pair formed by the remaining pump shafts, and improving the long-term continuous working ability of the pump body. The bearing box provided in the present application can cooperate with the heat transfer component to construct a coolant delivery channel, and simultaneously construct a lubricating oil delivery channel parallel to the coolant delivery channel, so as to adjust the working temperature of the bearing box by synchronously cooling the outer ring of the sliding bearing and the lubricating oil, thereby avoiding excessive wear of the sliding friction pair constructed inside the bearing box due to overheating friction, while maintaining the performance of the lubricating oil and its ability to form a lubricating oil film between the friction surfaces, thereby maintaining the friction force at a lower range, avoiding the risk of oil film failure and increased friction, resulting in a sharp increase in friction heat, and greatly improving the wear resistance and service life of the pump body.

[0017] Compared with the existing water cooling method, the present application does not need to construct a sufficiently large temperature gradient to achieve passive heat transfer, thus avoiding the single water cooling method that requires direct contact between the low-temperature water body and the sliding bearing in the bearing box that generates frictional heat, resulting in a large temperature difference between the inside and outside of the sliding bearing, causing its substrate to suffer from thermal fatigue under the continuous large temperature difference thermal shock, a rapid decline in wear resistance, and a sharp shortening of the working life. The present application actively transfers heat by providing an active heat transfer plate made of semiconductor heat exchange plates, thereby achieving continuous and efficient heat transfer under small temperature difference conditions and avoiding the defect of the sliding bearing being in high and low temperature environments at the same time and being subjected to thermal shock. Thus, while efficiently transferring heat, the stability of the working temperature is ensured, and the working state of the sliding bearing can be maintained for a long time to avoid its working performance degradation, thereby effectively improving the wear resistance and working life of the pump casing during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a preferred wear-resistant pump body proposed by the utility model;

[0019] Figure 2 It is a schematic axial cross-sectional view of a sliding bearing composed of an inner ring and an outer ring of a sliding bearing of a preferred wear-resistant pump body proposed by the present invention.

[0020] Reference Signs List

[0021] 1: Pump casing; 2: Pump cover; 3: Pump shaft; 4: Impeller; 5: Rotary drive unit; 6: Oil seal assembly; 7: Bearing housing; 8: Heat transfer assembly; 11: Extended positioning plate; 61: First shaft sleeve; 62: Wear ring; 63: First sealing rubber ring; 64: External plate; 65: Oil seal seat; 66: Oil seal ring; 67: Second sealing rubber ring; 71: Housing; 72: Sliding bearing inner ring; 73: Sliding bearing outer ring; 74: First active heat transfer ring; 75: Suction mechanism ;711: first heat dissipation ring cavity;712: second heat dissipation ring cavity;713: U-shaped flat tube;714: ring body gap;715: liquid guide ring cavity;716: L-shaped conduit;721: guide groove;722: rolling shaft;723: positioning ring plate;724: positioning baffle;725: positioning screw;751: suction chamber shell;752: second active heat transfer plate;753: piston;754: hydraulic drive rod;81: coolant inlet pipe;82: coolant outlet pipe. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] The following will describe in detail the technical solutions provided by the present invention by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In some cases, some implementations are not described or are not described in detail because they belong to existing or conventional technologies.

[0024] In addition, the technical features described herein, or the steps of all methods or processes disclosed herein, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0025] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" in this application, where reasonable (and not self-contradictory), include both direct and indirect connections (couplings).

[0026] The following is a detailed description with reference to the accompanying drawings.

[0027] Example 1

[0028] The present application provides a wear-resistant pump body, which includes a pump casing 1, a pump cover 2, a pump shaft 3, an impeller 4, a rotary drive unit 5, an oil seal assembly 6, a bearing box 7 and a heat transfer assembly 8.

[0029] according to Figure 1-2 In a specific embodiment shown, a pump shaft 3, which is in transmission connection with a rotary drive unit 5, is rotatably inserted into a pump casing 1. A pump cover 2, which cooperates with the rotary drive unit 5 to form a drainage chamber, is abutted against the end of the pump casing 1 remote from the rotary drive unit 5. The end of the pump shaft 3, which is positioned within the drainage chamber formed by the pump casing 1 and the pump cover 2, is connected to an impeller 4. An oil seal assembly 6, which is sleeved on the pump shaft 3, is also provided within the pump casing 1. A bearing housing 7 is also provided between the pump casing 1 and the rotary drive unit 5. A heat transfer assembly 8 is also provided on the outside of the bearing housing 7, which is capable of forming a parallel cooling circuit therewith. The bearing box 7 provided in the present application can reduce its temperature by providing an active heat transfer module for active heat exchange and cooling of the heating elements or the heated lubricating oil, so that the operating temperature of the elements in the bearing box 7 can be maintained in a relatively stable and reasonable temperature range, thereby ensuring the normal operation of the pump body, avoiding problems such as overheating damage caused by excessively high operating temperature or hot and cold fatigue damage caused by direct contact with low-temperature coolant and exposure to large temperature difference hot and cold shocks, thereby greatly improving the service life and working stability of the bearing box 7, thereby effectively improving the wear resistance of the sliding friction pair formed by the remaining pump shafts 3, and improving the long-term continuous working ability of the pump body. The bearing box 7 provided in the present application can cooperate with the heat transfer component 8 to construct a coolant delivery channel, and simultaneously construct a lubricating oil delivery channel parallel to the coolant delivery channel, so that the coolant can absorb the heat of the sliding bearing outer ring 73 transferred by the first active heat transfer ring plate 74 while directional passing through the bearing box 7. At the same time, it can also absorb the heat of the lubricating oil transferred by the second active heat transfer plate 752, thereby adjusting the working temperature of the bearing box 7 by synchronously cooling the sliding bearing outer ring 73 and the lubricating oil, avoiding excessive wear of the sliding friction pair constructed inside the bearing box 7 due to overheating friction, while maintaining the performance of the lubricating oil and its ability to form a lubricating oil film between the friction surfaces, thereby maintaining the friction force in a lower range, avoiding the risk of oil film failure and increased friction, resulting in a sharp increase in friction heat, and greatly improving the wear resistance and service life of the pump body.

[0030] Preferably, the oil seal assembly 6 includes a first sleeve 61, a wear ring 62, a first sealing rubber ring 63, an external plate 64, an oil seal seat 65, an oil seal ring 66, and a second sealing rubber ring 67. Preferably, the first sleeve 61 is sleeved on the shaft of the pump shaft 3 close to the impeller 4. Further preferably, the wear ring 62 is sleeved on the side of the first sleeve 61 close to the impeller 4. Further preferably, the first sealing rubber ring 63 is provided on the side of the wear ring 62 facing the impeller 4. Preferably, an oil seal seat 65 is also sleeved on the outer side of the first sleeve 61. Further preferably, the side of the oil seal seat 65 close to the impeller 4 is sleeved on the wear ring 62, and a second sealing rubber ring 67 is also embedded between the wear ring 62 and the oil seal seat 65. Preferably, an oil seal ring 66 is also provided on the side of the oil seal seat 65 away from the wear ring 62, located between the oil seal seat 65 and the first sleeve 61. Preferably, the outer side of the oil seal seat 65 is further assembled and connected to the pump housing 1 via an external connecting plate 64. Specifically, the oil seal structures provided in this application are all prior art. In a preferred embodiment, the annular cavity between the external connecting plate 64 of the oil seal assembly 6, the oil seal seat 65, and the pump body 1 can be filled with continuously flowing cooling water to dissipate heat.

[0031] Preferably, the bearing housing 7 includes a housing 71, a sliding bearing inner ring 72, a sliding bearing outer ring 73, a first active heat transfer ring 74, and a suction mechanism 75. Preferably, the sliding bearing inner ring 72 is sleeved onto the pump shaft 3. Further preferably, two sliding bearing outer rings 73 are sleeved on the outer side of the sliding bearing inner ring 72, each flush with its end faces. Specifically, preferably, the housing 71 encases the sliding bearing inner ring 72 and the sliding bearing outer ring 73 in a manner that defines their axial relative positions. That is, the housing 71 is movably sleeved onto the pump shaft 3, covering both the sliding bearing inner ring 72 and the sliding bearing outer ring 73. The housing 71 is connected to both axial ends of the sliding bearing outer ring 73. Preferably, the outer surface of the sliding bearing outer ring 73, facing away from the sliding bearing inner ring 72, is covered with a first active heat transfer ring 74 to dissipate heat. Preferably, the exterior of the housing 71 is also provided with a suction mechanism 75 that cooperates therewith to form a lubricating oil circulation loop and drive the circulation of the lubricating liquid. The first active heat transfer ring 74 provided in the present application can absorb and transfer the heat generated by the sliding bearing outer ring 73 when relative sliding friction occurs between the sliding bearing outer ring 73 and the sliding bearing inner ring 72. This is equivalent to the passive diffusion structure of traditional liquid cooling. The first active heat transfer ring 74 provided in the present application can actively absorb the heat generated by the sliding bearing outer ring 73 under small temperature differences, thereby achieving efficient active heat transfer, reducing the impact damage of the temperature difference environment on the sliding bearing outer ring 73, and can also controllably change its heat absorption efficiency, thereby ensuring heat transfer efficiency and heat dissipation speed. The first active heat transfer ring 74 can also transfer the heat it absorbs directly from its heat release end to the coolant, thereby ensuring its heat transfer capacity and heat exchange effect. The suction mechanism 75 provided in the present application can also cooperate with the box shell 71 to cool the lubricating oil, which is equivalent to a passive diffusion mechanism. It can construct an active heat absorption structure, thereby efficiently transferring heat in the lubricating oil, improving the effect and efficiency of heat dissipation of the lubricating oil, and ensuring the continuous lubrication performance of the lubricating oil.

[0032] Preferably, the axial ends of the housing 71 are connected to the pump housing 1 and the rotary drive unit 5 respectively. Preferably, it can be placed upright so that the lubricating oil can quickly pass through the liquid guide gap during the relative rotation of the sliding bearing inner ring 72 and the sliding bearing outer ring 73. Preferably, a first heat dissipation ring cavity 711 and a second heat dissipation ring cavity 712 that can wrap the first active heat transfer ring plate 74 are respectively constructed between the housing 71 and the two sliding bearing outer rings 73. Further preferably, a U-shaped flat tube 713 that can connect the first heat dissipation ring cavity 711 and the second heat dissipation ring cavity 712 is also inserted into the housing 71. The first heat dissipation ring cavity 711 and the second heat dissipation ring cavity 712 and the U-shaped flat tube 713 set in the present application can form a smooth directional flow channel with the heat transfer component 8, so that the continuously transported small temperature difference coolant can continuously transfer the heat output by the first active heat transfer ring plate 74 by passive heat input, thereby achieving efficient heat transfer.

[0033] Preferably, an annular gap 714 is provided between the housing 71 and the sliding bearing inner ring 72, located between the two sliding bearing outer rings 73. Further preferably, the axial ends of the annular gap 714 are connected to the liquid-conducting gap between the sliding bearing inner ring 72 and the sliding bearing outer ring 73. Preferably, a liquid-conducting annular cavity 715 is also provided within the housing 71, positioned at opposite ends of the two sliding bearing outer rings and capable of communicating with the liquid-conducting gap between the sliding bearing inner ring 72 and the sliding bearing outer ring 73. The liquid-conducting annular cavity 715 can transfer lubricating oil into or out of the liquid-conducting gap. Preferably, both liquid-conducting annular cavities 715 are connected to the suction mechanism 75 located outside the housing 71 via an L-shaped conduit 716, thereby forming a lubricating oil circulation loop between the housing 71 and the suction mechanism 75. Preferably, the pump body of the present application can be placed upright so that the liquid guiding gap between the inner ring 72 of the sliding bearing and the outer ring 73 of the sliding bearing is in a vertical state, so that the lubricating liquid can fall under the action of rotational force and gravity, thereby realizing the flow of lubricating liquid in the liquid guiding gap, so that the suction mechanism 75 can be transferred faster and the lubricating oil forming the oil film can be quickly replaced, thereby maintaining the working temperature of the lubricating oil.

[0034] Preferably, a plurality of guide grooves 721 are circumferentially spaced apart on the outer surface of the sliding bearing inner ring 72. Preferably, a rolling shaft 722 is rotatably inserted through the guide groove 721. Preferably, the side of the rolling shaft 722 facing away from the bottom of the guide groove 721 rolls against the inner surface of the sliding bearing outer ring 73. Furthermore, preferably, positioning rings 723 are connected to both axial ends of the sliding bearing inner ring 72 via positioning screws 725. Positioning stoppers 724 are circumferentially spaced apart along the outer diameter edge of the positioning rings 723, corresponding to the guide grooves 721 and capable of defining the position of the rolling shaft 722 within the guide groove 721. The positioning stoppers 724 provided in this application can define the position of the rolling shaft 722, enabling the rolling shaft 722 to rotate within the guide groove 721 when the sliding bearing inner ring 72 and the sliding bearing outer ring 73 rotate relative to each other, thereby reducing friction between the sliding bearing inner ring 72 and the sliding bearing outer ring 73, thereby reducing frictional heat.

[0035] Preferably, the suction mechanism 75 includes a suction chamber shell 751, a second active heat transfer plate 752, a piston 753, and a hydraulic drive rod 754. Preferably, a second active heat transfer plate 752 is embedded on the top surface of the suction chamber shell 751, capable of heat transfer to the lubricating oil flowing directionally in its inner cavity. Specifically, the end surface of the second active heat transfer plate 752 away from the suction shell cavity 751 is embedded on the U-shaped flat tube 713. Preferably, the piston 753 is placed in the suction chamber shell 751 in a manner that can cooperate with the suction chamber shell 751 to form a closed cavity with a variable volume. Preferably, the hydraulic drive rod 754 is inserted into the inner cavity of the suction chamber shell 751 from the open end, and the insertion front end of the hydraulic drive rod 754 is connected to the piston 753, so that the working position of the piston 753 in the suction chamber shell 751 can be changed by extending or retracting the length of the rod body, thereby adjusting the volume of the closed cavity. Preferably, the open end of the suction chamber housing 751 and the end of the hydraulic drive rod 754 away from the piston 753 are both connected to the extended positioning plate 11 of the pump housing 1.

[0036] Preferably, the heat transfer assembly 8 includes a coolant inlet pipe 81 communicating with the first heat dissipation ring cavity 711 and a coolant outlet pipe 82 communicating with the second heat dissipation ring cavity 712. Preferably, the input end of the coolant inlet pipe 81 and the output end of the coolant outlet pipe 82 are respectively connected to the output end and the input end of an external coolant cooling device, thereby forming a closed coolant circulation loop with the external coolant cooling device.

[0037] The present utility model is not limited to the above-mentioned optional implementation methods. Anyone can derive other forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, any technical solution that falls within the scope defined by the claims of the present utility model falls within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A wear-resistant pump body, comprising a pump casing (1), a pump cover (2), a pump shaft (3) and an impeller (4), characterized in that: The pump shaft (3) in transmission connection with the rotary drive unit (5) is rotatably provided in the pump housing (1), and the pump housing (1) is docked with the pump cover (2) at one end away from the rotary drive unit (5) and can cooperate with the pump cover to form a drainage cavity. The end of the pump shaft (3) placed in the drainage cavity formed by the pump housing (1) and the pump cover (2) is connected to the impeller (4); An oil seal assembly (6) sleeved on the pump shaft (3) is also provided in the pump housing (1), a bearing box (7) is also provided between the pump housing (1) and the rotary drive unit (5), and a heat transfer assembly (8) capable of forming a parallel cooling circuit with the bearing box (7) is also provided on the outside of the bearing box (7).

2. The wear-resistant pump body according to claim 1, characterized in that: The bearing box (7) comprises a box shell (71), a sliding bearing inner ring (72), a sliding bearing outer ring (73) and a first active heat transfer ring (74), wherein: The sliding bearing inner ring (72) is sleeved on the pump shaft (3), and two sliding bearing outer rings (73) are sleeved on the outer side of the sliding bearing inner ring (72) at intervals. The housing (71) encloses the inner ring (72) and the outer ring (73) of the sliding bearing in a manner that defines the relative axial positions of the inner ring (72) and the outer ring (73); The first active heat transfer ring sheet (74) capable of dissipating heat is attached to the outer surface of the sliding bearing outer ring (73) away from the sliding bearing inner ring (72).

3. The wear-resistant pump body according to claim 2, characterized in that: A first heat dissipation ring cavity (711) and a second heat dissipation ring cavity (712) capable of enclosing the first active heat transfer ring plate (74) are respectively constructed between the box shell (71) and the two sliding bearing outer rings (73), and a U-shaped flat tube (713) capable of connecting the first heat dissipation ring cavity (711) and the second heat dissipation ring cavity (712) is also inserted into the box shell (71).

4. The wear-resistant pump body according to claim 3, characterized in that: An annular gap (714) is also provided between the housing (71) and the sliding bearing inner ring (72), and is located between the two sliding bearing outer rings (73). The axial ends of the annular gap (714) are connected to the liquid guide gap between the sliding bearing inner ring (72) and the sliding bearing outer ring (73).

5. The wear-resistant pump body according to claim 4, characterized in that: A plurality of guide grooves (721) are provided at intervals in an annular direction on the outer surface of the inner ring (72) of the sliding bearing, and a rolling shaft (722) is rotatably passed through the guide groove (721); The axial ends of the sliding bearing inner ring (72) are also connected to positioning ring pieces (723) through positioning screws (725), and the outer diameter edge of the positioning ring piece (723) is circumferentially spaced and connected to positioning baffles (724) corresponding to the guide groove (721) and capable of limiting the position of the rolling shaft (722) in the guide groove (721).

6. The wear-resistant pump body according to claim 5, characterized in that: A liquid guide ring cavity (715) is also provided in the housing (71) at the ends of the two sliding bearing outer rings that are separated from each other and can connect the liquid guide gap between the sliding bearing inner ring (72) and the sliding bearing outer ring (73).

7. The wear-resistant pump body according to claim 6, characterized in that: The two liquid-guiding annular cavities (715) are both connected to the suction mechanism (75) located outside the box shell (71) through an L-shaped conduit (716), thereby forming a lubricating oil circulation loop between the box shell (71) and the suction mechanism (75).

8. The wear-resistant pump body according to claim 7, characterized in that: The suction mechanism (75) includes a suction chamber shell (751), a second active heat transfer plate (752), a piston (753) and a hydraulic drive rod (754), wherein: The second active heat transfer sheet (752) capable of heat transfer of lubricating oil flowing directionally in the inner cavity of the suction chamber shell (751) is embedded on the top surface of the suction chamber shell (751), and the second active heat transfer sheet (752) The end surface away from the suction chamber shell (751) is embedded in the U-shaped flat tube (713); The piston (753) is placed in the suction chamber housing (751) in a manner that can cooperate with the suction chamber housing (751) to form a closed chamber with a variable volume; The hydraulic drive rod (754) is inserted into the inner cavity of the suction chamber shell (751) from the open end thereof, and the insertion front end of the hydraulic drive rod (754) is connected to the piston (753).

9. The wear-resistant pump body according to claim 8, characterized in that: The open end of the suction chamber housing (751) and the end of the hydraulic drive rod (754) away from the piston (753) are both connected to the extended positioning plate (11) of the pump housing (1).

10. The wear-resistant pump body according to claim 9, characterized in that: The heat transfer assembly (8) comprises a cooling liquid input pipe (81) communicating with the first heat dissipation ring cavity (711) and a cooling liquid output pipe (82) communicating with the second heat dissipation ring cavity (712).

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