High-pressure water pump based on water or aqueous solution lubrication

Abstract

A high-pressure water pump based on water or water solution lubrication is provided with a water inlet main flow channel, the water inlet main flow channel is communicated with a water inlet of the water pump and a water inlet one-way valve, and water or water solution directly flows into the water inlet one-way valve through the water inlet main flow channel to achieve water supply. The communicating flow channel is arranged on the hydraulic cylinder body, or the communicating flow channel is arranged in an external pipeline mode, and the water inlet one-way valve and the containing space are in fluid communication. Most inlet water directly enters the water inlet one-way valve from the water inlet of the water pump through the water inlet main flow channel and is discharged after being pressurized; the disturbance of the containing space is only transmitted through the communication channel with the limited size, and only a small amount of inflow water comes from the containing space, so that the disturbance is greatly limited. Water-free operation of the water pump is avoided through the arrangement of the communicating flow channel, impurities caused by frictional wear of a water pump movement mechanism can be discharged, and long-term and stable operation of the water pump is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-pressure water pump based on water or water solution lubrication. BACKGROUND

[0002] Water-lubricated high-pressure water pump is a new technology in the field of pump development, unlike reciprocating pump using lubricating oil to lubricate power end, the driving element of water-lubricated high-pressure water pump does not need to use lubricating oil, through special structural design, only water or water solution can solve the lubrication problem of power components and run efficiently. Since water-lubricated high-pressure water pump does not need lubricating oil, environmental pollution is avoided, and longer maintenance-free life can be achieved, and is widely used in high-pressure cleaning, high-pressure fogging, fine mist fire extinguishing, seawater desalination, high-pressure deburring and other fields.

[0003] As described in patent ZL202321748625.7, the newly developed water-lubricated high-pressure water pump uses an eccentric shaft to drive the piston or plunger, and the specific structure is as follows: an eccentric shaft is arranged in the housing of the water pump, and an eccentric structure (i.e. eccentric wheel) is arranged on the eccentric shaft. The outer circumferential surface of the eccentric wheel is sleeved with a thrust ring structure. When the eccentric shaft rotates (while driving the eccentric wheel to rotate), the thrust ring structure pushes the plunger to move to realize the pressurization output of water or water solution. The water pump specifically includes a liquid cylinder body and a housing. The liquid cylinder body is internally provided with a water inlet check valve and a water outlet check valve. The driving mechanism is connected to the housing. The liquid cylinder body and the housing are fixedly connected to form an accommodation space. In addition to accommodating the eccentric structure and the thrust ring, the accommodation space is also used to fill water or water solution. When the water pump is working, water or water solution provides lubrication and heat dissipation for the moving mechanism.

[0004] As described in patent ZL201510036848.4, the water-lubricated high-pressure water pump proposed in this patent sets the water inlet of the water pump on the housing. Water or water solution first enters the housing space from the water supply pipeline. After completing the lubrication and heat dissipation of the moving mechanism in the housing space, it enters the liquid cylinder body from the housing space. Through the coordinated movement of the water inlet check valve, the water outlet check valve, and the plunger, the water is pressurized and flows out of the pump body from the liquid cylinder body. This water inlet method is simple in structure and has good cooling effect on the moving mechanism in the housing. However, through actual testing, it is found that the water pump using this water inlet method has significantly increased noise, large output high-pressure water pulsation, and poor pump working stability.

[0005] Based on the structure of patent ZL201510036848.4, further in-depth research revealed that after water or aqueous solution enters the housing, the high-speed rotation of the eccentric wheel agitates the water within the housing, causing rapid and unstable flow. This turbulent water flow, upon entering the liquid cylinder, impacts and disrupts the opening and closing stability of the inlet and outlet check valves. Consequently, the fluid pulsation of the pump's output water or aqueous solution increases, significantly increasing pump noise and deteriorating the pump's operational stability. Utility Model Content

[0006] (I) Technical Issues

[0007] In summary, how to overcome the problems of large fluid pulsation and high noise in existing water pumps, while ensuring good lubrication and cooling of the moving mechanism inside the pump casing, and being able to remove grinding debris generated by long-term friction of the moving mechanism, has become an urgent problem to be solved by those skilled in the art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] This utility model provides a high-pressure water pump based on water or aqueous solution lubrication. The high-pressure water pump includes: a water pump inlet, a main water inlet channel, a cylinder body, a housing, a plunger cavity, plungers, a drive mechanism, and a connecting channel; the cylinder body is provided with an inlet check valve and an outlet check valve; the drive mechanism includes an eccentric wheel shaft, and an eccentric wheel is provided on the eccentric wheel shaft; the number of plungers is greater than or equal to two, and the plunger cavity is provided with plunger holes corresponding to each plunger, and the plungers can reciprocate within the plunger holes; the cylinder body and the housing are fixedly connected, and the internal space formed after the connection of the cylinder body and the housing is a receiving space, in which the eccentric wheel is provided, and the receiving space is also used to fill water or aqueous solution;

[0011] The main inlet channel connects the water pump inlet and the inlet check valve. Through the main inlet channel, water or aqueous solution can flow directly from the water pump inlet to the inlet check valve without passing through the containment space to achieve water supply. Through the connecting channel, the fluid between the inlet check valve and the containment space can be interconnected.

[0012] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by this utility model, the number of connecting channels is greater than or equal to one; when the cross-section of the smallest connecting channel is circular, the cross-sectional area of ​​the channel is less than half of the cross-sectional area of ​​the plunger hole; when the cross-section of the smallest connecting channel is of other shapes, the cross-sectional area of ​​the channel is less than three times the cross-sectional area of ​​the plunger hole.

[0013] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by this utility model, a porous material filter is provided between the main water inlet channel and the receiving space. The porous material filter has interconnected holes inside, which form the connecting flow channel. Water or aqueous solution flows through the holes inside the porous material filter to achieve fluid communication between the receiving space and the main water inlet channel.

[0014] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by this utility model, the inlet check valve is horizontally arranged, and the inlet of the inlet check valve faces away from the eccentric wheel shaft.

[0015] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by this utility model, the cylinder body includes a cylinder body main body and a cylinder body water inlet component. The plunger cavity is manufactured separately from the cylinder body. The cylinder body water inlet component, the cylinder body main body and the plunger cavity are connected into a sandwich integrated structure by screws with the cylinder body main body as the intermediate layer.

[0016] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by this utility model, a thrust ring structure is sleeved on the outer circumferential surface of the eccentric wheel, and the thrust ring structure and the eccentric wheel are rotatably connected.

[0017] (III) Beneficial Effects

[0018] In the above structural design:

[0019] 1. This utility model features a main inlet channel independent of the containing space, allowing water to flow directly from the pump inlet to the inlet check valve. A connecting channel, either on the cylinder body or through other means, establishes fluid communication between the containing space and the inlet check valve. With this structure, the majority of the incoming water enters the inlet check valve directly from the pump inlet through the main inlet channel, where it is then pressurized and discharged. Disturbances to the containing space are only transmitted through the limited-sized connecting channel, and only a small amount of water originates from within the containing space, thus significantly limiting disturbances. The connecting channel prevents the pump from operating without water and removes impurities caused by friction and wear in the pump's moving parts, ensuring long-term, stable operation of the pump.

[0020] 2. This utility model proposes various interconnected flow channel structures to further control noise. The interconnected flow channel can be a small-hole flow channel with a circular cross-section, or it can be a flow channel with a non-circular cross-section, such as an annular hole. Alternatively, it can be made by using porous materials, utilizing the dense small holes inside the porous materials to connect the receiving space and the main inlet flow channel. By limiting the cross-sectional size of the flow channel, in addition to reducing disturbance interference, the damping effect of the flow channel can be fully utilized to further reduce noise, making the water pump operate more quietly.

[0021] 3. Compared with traditional solutions, although this utility model reduces the cooling effect on the water pump, it can still meet the needs of conventional application scenarios. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a high-pressure water pump based on water or aqueous solution lubrication in this utility model when the connecting flow channel is a through hole structure.

[0024] Figure 2 This is a schematic diagram of the structure of a high-pressure water pump based on water or aqueous solution lubrication, where a filter element is installed in the connecting flow channel.

[0025] exist Figure 1 and Figure 2 In the diagram, the correspondence between component names and reference numerals is as follows:

[0026] 1. Main body of hydraulic cylinder; 2. Hydraulic cylinder inlet component; 3. Housing; 4. Accommodation space; 5. Plunger cavity; 6. Plunger hole; 7. Plunger; 8. Anti-friction sleeve; 9. Spring bracket; 10. Spring; 11. Main shaft; 12. Eccentric wheel; 13. Thrust ring; 14. Main inlet channel; 15. Check valve inlet channel; 16. Check valve outlet channel; 17. Inlet check valve; 18. Outlet check valve; 19. Screw; 20. Connecting channel; 21. Filter component. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0028] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] Please refer to Figure 1 and Figure 2 This utility model provides a high-pressure water pump based on water or aqueous solution lubrication, including: a water pump inlet (not shown in the figure), a main water inlet channel 14, a cylinder body, a housing 3, a plunger chamber 5, a plunger 7, and a drive mechanism.

[0030] The hydraulic cylinder body, also known as the pump head, contains high and low pressure water channels, as well as an inlet check valve 17 and an outlet check valve 18. It is the main component of the high-pressure water pump that withstands high-pressure water pressure. The high and low pressure water channels on the hydraulic cylinder body include an inlet main channel 14, a check valve inlet channel 15, and a check valve outlet channel 16. When the check valves are not installed, the check valve inlet channel 15 and the check valve outlet channel 16 are connected to the plunger hole 6 of the plunger chamber 5. The inlet of the inlet check valve 17 is connected to the check valve inlet channel 15. The inlet check valve 17 opens when the pump draws water, allowing water or an aqueous solution to flow in one direction. The outlet of the outlet check valve 18 is connected to the check valve outlet channel 16 and is used to discharge the pressurized water out of the hydraulic cylinder body in one direction. The main water inlet channel 14 is preferably located on the liquid cylinder body, but it can also be located on other parts of the water pump, including through an external pipeline to achieve the water supply function.

[0031] A drive mechanism is also installed on the housing to drive the plunger 7 to reciprocate within the plunger cavity 5. The drive mechanism includes an eccentric shaft, on which an eccentric wheel 12 is mounted. A thrust ring 13, corresponding to the eccentric wheel 12, is mounted on the eccentric wheel 12. The thrust ring 13 is fitted onto the outer circumferential surface of the eccentric wheel 12, and the thrust ring 13 and the eccentric wheel 12 are rotatably connected, forming a first sliding friction pair.

[0032] A plunger cavity structure (i.e., plunger cavity 5, which is a specific structural component) is provided within the housing 3. A plunger hole 6 is provided on the plunger cavity 5, and a plunger 7 is provided in the plunger hole 6. At least two plungers 7 are provided, and the number of plunger holes 6 corresponds one-to-one with the number of plungers 7. The plunger cavity 5 is connected to the hydraulic cylinder body, or the plunger cavity 5 and the hydraulic cylinder body are integrally molded structures (i.e., the main constituent materials are continuous). The plunger 7 can reciprocate within the plunger hole 6, and the plunger 7 and the plunger hole 6 constitute a second sliding friction pair.

[0033] The cylinder body and the housing 3 are fixedly connected. The internal space formed by the connection of the cylinder body and the housing 3 is the receiving space 4. The receiving space 4 is equipped with an eccentric wheel 12 and a thrust ring 13. The receiving space 4 is also used to fill water or an aqueous solution. The water or aqueous solution can lubricate and cool the sliding friction pair formed by the thrust ring 13 and the eccentric wheel 12, and can also lubricate and cool the sliding friction pair formed by the plunger 7 and the plunger hole 6. The receiving space 4 is also equipped with a spring assembly (composed of a spring 10 and a spring bracket 9) to press the plunger 7 against the thrust ring 13.

[0034] When the eccentric wheel shaft rotates, as the center of the eccentric wheel 12 moves away from the cylinder body, the spring 10 pushes the plunger 7 away from the cylinder body. This increases the space within the plunger hole 6 that can hold fluid, creating a negative pressure relative to the pump inlet. At this time, the inlet check valve 17 opens, allowing water or an aqueous solution to flow through the pump inlet, the main inlet channel 14, the check valve inlet channel 15, and the inlet check valve 17 to the plunger hole 6, thus achieving pump suction. When the center of the eccentric wheel 12 moves closer to the cylinder body, the thrust ring 13 pushes the plunger 7 closer to the cylinder body. This reduces the space within the plunger hole 6 that can hold fluid, increasing the fluid pressure within the plunger hole 6. Under this pressure, the inlet check valve 17 closes, and the outlet check valve 18 opens. The water or aqueous solution within the plunger hole 6 flows out through the outlet check valve 18 to the check valve outlet channel 16, thus draining the pump from the cylinder body. During the water intake or drainage process, the thrust ring 13 always abuts against the end face of the plunger 7 and rolls back and forth on the end face of the plunger 7, relying on rolling friction contact to achieve the interaction of forces between the thrust ring 13 and the plunger 7.

[0035] In this embodiment, the plunger chamber 5 and the hydraulic cylinder body are independent structures. The hydraulic cylinder body includes a main body 1 and a water inlet component 2. The main body 1 contains an inlet check valve 17, an outlet check valve 18, and high and low pressure flow channels (including an inlet flow channel 15 and an outlet flow channel 16). The inlet check valve 17 is horizontally positioned with its inlet facing away from the housing 3. The outlet check valve 18 is vertically positioned with its inlet facing downwards. The inlet flow channel 15, outlet flow channel 16, inlet check valve 17, outlet check valve 18, and plunger 7 are in a one-to-one correspondence. The number of inlet check valves 17 and outlet check valves 18 is greater than two. The inlet check valves 17 and outlet check valves 18 are sequentially installed on the hydraulic cylinder body along a direction parallel to the eccentric wheel axis.

[0036] The cylinder body water inlet component 2 has a main water inlet channel 14 parallel to the center line of the eccentric wheel shaft. The main water inlet channel 14 is directly connected to the water pump inlet. The cylinder body water inlet component 2 has holes on the side facing the cylinder body 1 that lead to each water inlet check valve 17. Water or aqueous solution can be directly introduced from the water source through the water pump inlet to the main water inlet channel 14, and then enter the water inlet check valve 17 through the check valve inlet channel 15. It should be noted that the water pump inlet is preferably located on the cylinder body water inlet component 2, but it can also be located on other components of the water pump.

[0037] The main body of the hydraulic cylinder 1 and the hydraulic cylinder water inlet component 2 are preferably independent structures, but they can also be manufactured as a whole. In this embodiment, the main body of the hydraulic cylinder 1 and the hydraulic cylinder water inlet component 2 are manufactured independently. The hydraulic cylinder water inlet component 2, the main body of the hydraulic cylinder 1 and the plunger cavity 5 are connected into a whole by screws 19, with the main body of the hydraulic cylinder 1 as the middle layer, forming a "sandwich" sandwich-type combined structure.

[0038] A connecting channel 20 is also provided inside the water inlet component 2 of the cylinder body, and a corresponding connecting channel 20 is also provided inside the main body 1 of the cylinder body. The connecting channel 20 is horizontally arranged and perpendicular to the direction of the eccentric wheel shaft. The connecting channel 20 realizes the fluid communication between the main water inlet channel 14 of the water inlet component 2 of the cylinder body and the receiving space 4. Since the water inlet check valve 17 is connected to the main water inlet channel 14, the water inlet check valve 17 and the receiving space 4 are also fluidly connected. In the preferred embodiment of this utility model, the connecting channel 20 is preferably in the shape of a long narrow hole, and preferably there are multiple channels. Through these connecting channels 20, water or aqueous solution can enter the receiving space 4 from the main water inlet channel 14 of the water inlet component 2 of the cylinder body, ensuring that there is always water in the receiving space 4, ensuring the lubrication of the moving mechanism; if there is no water in the receiving space, it will cause the water pump to be damaged quickly. This setting avoids the pump damage caused by human error such as not filling the water pump receiving space with water, and significantly improves the convenience and safety of the water pump.

[0039] The moving mechanism inside the pump body includes a friction pair consisting of a thrust ring 13 and an eccentric wheel 12, and a friction pair consisting of a plunger 7 and a plunger cavity 5. After prolonged operation, these friction pairs inevitably experience wear. If wear debris (small particles generated by friction) remains in the receiving space 4 for an extended period, it will exacerbate damage to the moving mechanism and needs to be removed promptly. Since the plunger 7 performs pressurization within the plunger hole 6, a tiny gap seals the plunger 7 and the plunger hole 6. Although the sealing gap is small, a small amount of high-pressure water can still leak through it during operation. Because the volume of the receiving space 4 is fixed, as water or an aqueous solution enters the receiving space 4 through the gap between the plunger 7 and the plunger cavity 5, water within the receiving space 4 is simultaneously discharged through the connecting channel 20. More importantly, the flow of fluid within the connecting channel 20 carries away wear debris from the pump's moving mechanism from the receiving space 4, achieving a self-cleaning function for the pump.

[0040] The water in the containment space 4 is agitated by the eccentric wheel shaft, resulting in large pulsations and a turbulent flow field. In a traditional water supply system, if the water from the water source passes through the water pump inlet and first enters the housing, the flow will become turbulent due to the agitation of the eccentric wheel. The turbulent water then enters the liquid cylinder, which will inevitably affect the stability of the water pump's operation, increase the pulsation of the high-pressure water output, and increase the noise.

[0041] In this implementation scheme, since water or aqueous solution can directly enter the one-way valve inlet channel 15 through the water pump inlet and the main inlet channel 14, the water supply source for most of the one-way valve inlet channel 15 no longer passes through the flow-accommodating space 4, and is therefore no longer directly affected by the agitation of the eccentric wheel shaft. This measure greatly improves the stability of the inlet flow field. Although the connecting channel 20 still connects the main inlet channel 14 and the accommodating space 4, theoretically, the fluid pulsation in the accommodating space 4 will still affect the flow field of the main inlet channel 14 to some extent; however, in practice, this effect can be further controlled to negligible levels through optimized design of the connecting channel 20.

[0042] When the connecting channel 20 is set to a small circular hole or an irregular hole such as a hole with a narrow gap, the combined effect of the two main factors will significantly slow down the transmission of pulsation.

[0043] 1. The smaller cross-sectional area of ​​the flow channel reduces the energy transferred by the pulsation through the connecting flow channel 20;

[0044] 2. The flow resistance generated by the small aperture and narrow gap converts pulsating energy into heat.

[0045] The research conducted shows that: 1. When the minimum cross-section of the connecting channel 20 is circular, and the area of ​​the channel cross-section is less than half the cross-sectional area of ​​the plunger orifice 6, the impact of the pulsation of the accommodating space 4 on the flow field of the main inlet channel 14 of the cylinder body water inlet component 2 can be effectively reduced, thus improving the operational stability of the water pump. Furthermore, with the channel cross-section remaining constant, the longer the channel length, the better the flow field stability of the main inlet channel 14. 2. When the minimum cross-section of the connecting channel 20 is of other shapes, such as a channel with a narrow gap, the flow resistance of the narrow gap can be further increased compared to a circular orifice with the same channel cross-sectional area. Therefore, even if a narrow gap with a larger channel cross-sectional area is used, the impact of the pulsation of the accommodating space 4 on the flow field of the main inlet channel 14 of the cylinder body water inlet component 2 can be effectively suppressed. Considering the constraints of the design space, the minimum channel cross-sectional area is preferably less than 3 times the cross-sectional area of ​​the plunger orifice 6. Moreover, the longer the channel length and the narrower the gap used in the design, the better the flow field stability of the main inlet channel 14.

[0046] In this invention, the cross section refers to the section of the pipe or channel (specifically the connecting flow channel 20) that is perpendicular to the flow direction of the water or aqueous solution.

[0047] When the containment space is short of water, the connecting channel 20 needs to replenish the water supply. The larger the cross-section of the connecting channel 20, the faster the water replenishment is completed. In addition, a larger cross-section of the connecting channel 20 also means that the wear and tear material in the containment space is discharged more quickly. Therefore, the cross-sectional area of ​​the connecting channel 20 is not necessarily better the larger it is, nor is it better the smaller it is. Various factors need to be considered comprehensively, and the final verification should be carried out through experiments.

[0048] However, in practical applications, increasing the number of holes and decreasing their cross-sectional area usually yields better results. The number of connecting channels 20 is defined as the total number of channels connecting the inlet check valve 17 and the accommodating space 4, where water or aqueous solution flows independently in at least a portion of the flow section.

[0049] Processing a large number of small holes typically increases manufacturing costs; this invention proposes a more economical and efficient method to achieve this. For example... Figure 2As shown, a porous material filter element 21 can be installed on the cylinder body or the external pipeline. The porous material filter element 21 is made of a material with a large number of interconnected pores inside. These small pores connect the main water inlet channel 14 and the receiving space 4, realizing a dense collection of small-sized interconnected flow channels 20. For the porous material filter element 21, due to the small size and large number of pores, the pulsation can be better attenuated when water or aqueous solution flows from the receiving space 4 to the main water inlet channel 14. Porous materials can be maturely prepared at present, such as porous ceramics, metal foams, etc., and the size of the pores can be well controlled. In this embodiment, the average pore diameter of the porous material filter element is preferably less than 3 mm.

[0050] It should be further explained that the connecting channel 20 is not necessarily located on the liquid cylinder body. In special cases, the main water inlet channel 14 and the receiving space can be fluidly connected through an external pipeline.

[0051] Because water from the water source enters the inlet check valve 17 directly, the cooling of the moving mechanism within the containment space 4 can only be achieved through the water retained within the containment space 4. Therefore, the cooling capacity of the structure adopted in this invention is significantly reduced compared to the traditional structure design where water is directly circulated within the containment space 4. However, since the main body 1 of the liquid cylinder can be made of a metal with good thermal conductivity, such as copper, and the water within the containment space 4 is agitated by the eccentric wheel shaft, the water and the liquid cylinder are in direct contact with each other on the side near the shell 3. The heat exchange between the water and the liquid cylinder is sufficient. The heat in the containment space 4 is transferred to the liquid cylinder through the water, and the liquid cylinder further transfers the heat to the water that needs to be pressurized, thus also removing a large amount of heat. At the same time, the shell 3 is also made of metal, and through heat exchange between the shell 3 and the air, it also has a certain heat dissipation capacity. In addition, water or aqueous solutions can also remove some heat through the fluid flow within the connecting channel 20. Due to the combined effects of these factors, the temperature rise of the water pump remains controllable. For a typical power water pump, the actual temperature rise of the pump shell 3 compared to the inlet water temperature does not exceed 10°C, which can still meet the needs of most commercial and industrial applications.

[0052] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-pressure water pump based on water or aqueous solution lubrication, characterized in that, include: The pump comprises a water pump inlet, a main water inlet channel, a cylinder body, a housing, a plunger cavity, a plunger, a drive mechanism, and a connecting channel. The cylinder body is equipped with an inlet check valve and an outlet check valve. The drive mechanism includes an eccentric wheel shaft with an eccentric wheel mounted on it. There are two or more plungers, and each plunger cavity has a plunger hole corresponding to a plunger, allowing the plunger to slide reciprocally within the plunger hole. The cylinder body and the housing are fixedly connected, and the internal space formed by their connection serves as a receiving space. The eccentric wheel is located within this receiving space, which is also used to fill water or an aqueous solution. The main inlet channel connects the water pump inlet and the inlet check valve. Through the main inlet channel, water or aqueous solution can flow directly from the water pump inlet to the inlet check valve without passing through the containment space to achieve water supply. Through the connecting channel, the fluid between the inlet check valve and the containment space can be interconnected.

2. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that, The number of connected channels is greater than or equal to one; when the minimum cross-section of the connected channel is circular, the cross-sectional area of ​​the channel must be less than half of the cross-sectional area of ​​the plunger orifice; when the minimum cross-section of the connected channel is of other shapes, the cross-sectional area of ​​the channel must be less than three times the cross-sectional area of ​​the plunger orifice.

3. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that, A porous material filter is provided between the main water inlet channel and the receiving space. The porous material filter has interconnected holes inside, which form the connecting flow channel. Water or aqueous solution flows through the holes inside the porous material filter to achieve fluid communication between the receiving space and the main water inlet channel.

4. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that, The inlet check valve is horizontally positioned with its inlet facing away from the eccentric wheel shaft.

5. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that, The cylinder body includes a cylinder body main body and a cylinder body water inlet component. The plunger cavity is manufactured separately from the cylinder body. The cylinder body water inlet component, cylinder body main body and plunger cavity are connected into a sandwich integrated structure by screws with the cylinder body main body as the middle layer.

6. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that, A thrust ring structure is fitted on the outer circumferential surface of the eccentric wheel, and the thrust ring structure and the eccentric wheel are rotatably connected.

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