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

Abstract

A high-pressure water pump based on water or aqueous solution lubrication is provided with a water inlet main flow channel, the water inlet main flow channel communicates with a water inlet of the water pump and a water inlet one-way valve, and water or aqueous 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 invention relates to a high-pressure water pump based on water or aqueous solution lubrication. Background Art

[0002] Water-lubricated high-pressure water pumps are a new technology currently developed in the field of pumps. Unlike reciprocating pumps that use lubricating oil to lubricate the power end, water-lubricated high-pressure water pumps do not require lubricating oil for their drive components. Through a special structural design, only water or an aqueous solution is needed to solve the lubrication problem of the power components and operate efficiently. Since water-lubricated high-pressure water pumps do not require lubricating oil, environmental pollution is avoided, and a longer maintenance-free life can be achieved. They are 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 adopts an eccentric wheel shaft to realize the drive of the piston or plunger, and the specific structure is as follows: an eccentric wheel shaft is arranged in the housing of the water pump, and an eccentric wheel structure (i.e., eccentric wheel) is arranged on the eccentric wheel shaft, and a thrust ring structure is sleeved on the outer circumferential surface of the eccentric wheel. When the eccentric wheel shaft rotates (and drives the eccentric wheel to rotate at the same time), the thrust ring structure pushes the plunger to move to realize the pressurized output of water or aqueous solution; the water pump specifically comprises a cylinder body and a housing, and a water inlet check valve and a water outlet check valve are arranged inside the cylinder body, the driving mechanism is connected to the housing, the cylinder body and the housing are fixedly connected, and a accommodating space is formed inside. In addition to accommodating structures such as the eccentric wheel structure and the thrust ring, the accommodating space is also used to fill water or aqueous solution. When the water pump is working, the water or aqueous 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 the patent sets the water inlet of the water pump on the shell, and water or aqueous solution first enters the space inside the shell from the water supply pipeline, and then enters the liquid cylinder body from the space inside the shell after lubricating and cooling the moving mechanism in the space inside the shell. 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 has a simple structure and a good cooling effect on the moving mechanism in the shell. However, through actual testing, it is found that the noise of the water pump using this water inlet method is significantly increased, the pulsation of the output high-pressure water is large, and the pump operation stability is not good.

[0005] Based on the structure of patent ZL201510036848.4, further in-depth research found that after water or aqueous solution enters the shell, the high-speed rotation of the eccentric wheel will stir the water in the shell to flow rapidly and unsteadily. After the turbulently flowing water enters the cylinder body, it impacts and destroys the stability of the opening and closing of the water inlet and outlet check valves. For this reason, the fluid pulsation of the water or aqueous solution output by the pump increases, significantly increasing the noise of the water pump and worsening the working stability of the water pump. Summary of the invention

[0006] 1. Technical issues

[0007] To sum up, 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 in the water pump housing and discharging the grinding debris generated by the long-term friction movement of the moving mechanism, has become an urgent problem to be solved by technical personnel in this field.

[0008] (II) Technical solution

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] The present invention provides a high-pressure water pump based on water or aqueous solution lubrication, the high-pressure water pump comprising: a water pump water inlet, a water inlet main flow channel, a cylinder body, a shell, a plunger cavity, a plunger, a driving mechanism and a connecting flow channel; a water inlet check valve and a water outlet check valve are arranged in the cylinder body; the driving mechanism comprises an eccentric wheel shaft, an eccentric wheel is arranged on the eccentric wheel shaft; the number of the plungers is greater than or equal to two, and plunger holes corresponding to the plungers are arranged in the plunger cavity, and the plungers can reciprocate in the plunger holes; the cylinder body is fixedly connected to the shell, and the internal space formed after the cylinder body and the shell are connected is a receiving space, the eccentric wheel is arranged in the receiving space, and the receiving space is also used to fill water or aqueous solution;

[0011] The main water inlet channel connects the water pump inlet and the water inlet one-way valve. Through the main water inlet channel, water or aqueous solution can flow directly from the water pump inlet to the water inlet one-way valve without passing through the accommodating space to realize water supply; through the connecting flow channel, the fluid between the water inlet one-way valve and the accommodating space can be interconnected.

[0012] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by the present invention, the number of the connecting flow channels is greater than or equal to one; when the minimum flow channel cross-section of the connecting flow channel is a circle, the flow channel cross-sectional area is smaller than half of the cross-sectional area of ​​the plunger hole; when the minimum flow channel cross-sectional area of ​​the connecting flow channel is other shapes, the flow channel cross-sectional area is smaller than 3 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 the present invention, a porous material filter is arranged between the main water inlet channel and the accommodating space, and the interior of the porous material filter is provided with interconnected holes, and the holes form the connecting flow channel. After water or aqueous solution flows through the holes inside the porous material filter, fluid communication between the accommodating space and the main water inlet channel is achieved.

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

[0015] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by the present invention, the liquid cylinder body includes a liquid cylinder body main body and a liquid cylinder body water inlet component, the plunger cavity and the liquid cylinder body are manufactured separately, and the liquid cylinder body water inlet component, the liquid cylinder body main body and the plunger cavity are connected into a sandwich-type integrated structure by screws with the liquid 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 the present invention, the outer peripheral surface of the eccentric wheel is sleeved with a thrust ring structure, and the thrust ring structure and the eccentric wheel are rotatably connected.

[0017] (III) Beneficial effects

[0018] In the above structural design:

[0019] 1. The present invention is provided with a main water inlet channel independent of the accommodating space, and water can flow directly from the water inlet of the water pump through the main water inlet channel to the water inlet check valve to achieve water inlet; by providing a connecting flow channel on the cylinder body or in other ways, the connecting flow channel realizes fluid communication between the accommodating space and the water inlet check valve. Through the above-mentioned structural setting, most of the incoming water directly enters the water inlet check valve from the water inlet of the water pump through the main water inlet channel and is then discharged after being pressurized; the disturbance of the accommodating space is only transmitted through the connecting channel of limited size, and only a small amount of incoming water comes from the accommodating space, so the disturbance is greatly limited. The setting of the connecting flow channel avoids the dry operation of the water pump, and can discharge impurities caused by friction and wear of the water pump movement mechanism, ensuring the long-term and stable operation of the water pump.

[0020] 2. The present invention proposes a variety of connecting flow channel structures to further control noise. The connecting flow channel can be a small hole flow channel with a circular cross section, or a flow channel with a non-circular cross section such as an annular hole. It can also be provided with a porous material and use the dense small holes inside the porous material to connect the accommodating space and the main water inlet 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, so that the water pump works more quietly.

[0021] 3. Compared with the traditional solution, although the present invention reduces the cooling effect on the water pump, it can still meet the use of conventional application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0023] Figure 1 It is a structural schematic diagram of a case where the communicating flow channel provided in the high-pressure water pump based on water or aqueous solution lubrication in an embodiment of the present invention is a through-hole structure;

[0024] Figure 2 It is a structural schematic diagram of a case where a filter element is provided in a communicating flow channel of a high-pressure water pump lubricated based on water or aqueous solution in an embodiment of the present invention.

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

[0026] Liquid cylinder body 1, liquid cylinder water inlet component 2, shell 3, accommodating space 4, plunger cavity 5, plunger hole 6, plunger 7, friction reducing sleeve 8, spring bracket 9, spring 10, main shaft 11, eccentric wheel 12, thrust ring 13, water inlet main channel 14, one-way valve water inlet channel 15, one-way valve water outlet channel 16, water inlet one-way valve 17, water outlet one-way valve 18, screw 19, connecting channel 20, filter element 21. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0028] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

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

[0030] The cylinder body can also be called a pump head. The cylinder body is provided with high and low pressure water flow channels, a water inlet check valve 17 and a water outlet check valve 18. It is the main component of the high pressure water pump to withstand the high pressure water pressure. The high and low pressure water flow channels provided on the cylinder body include a main water inlet channel 14, a one-way valve water inlet channel 15, and a one-way valve water outlet channel 16. When the one-way valve is not installed, the one-way valve water inlet channel 15 and the one-way valve water outlet channel 16 are connected to the plunger hole 6 of the plunger cavity 5. The water inlet of the one-way valve 17 is connected to the one-way valve water inlet channel 15. The water inlet check valve 17 is opened when the water pump absorbs water, and water or aqueous solution can flow in one direction; the water outlet of the one-way valve 18 is connected to the one-way valve water outlet channel 16, which is used to discharge the pressurized water out of the cylinder body in one direction. The main water inlet channel 14 is preferably arranged on the cylinder body, and may also be arranged on other parts of the water pump, including realizing the water supply function through an external pipeline.

[0031] A driving mechanism is also installed on the housing for driving the plunger 7 to reciprocate in the plunger cavity 5. The driving mechanism comprises an eccentric shaft, an eccentric 12 is arranged on the eccentric shaft, a thrust ring 13 corresponding to the eccentric 12 is arranged on the eccentric 12, the thrust ring 13 is sleeved on the outer circumferential surface of the eccentric 12, the thrust ring 13 is rotatably connected to the eccentric 12, and the thrust ring 13 and the eccentric 12 constitute a first sliding friction pair.

[0032] A plunger cavity structure (i.e., plunger cavity 5, which is a specific structural member) is provided in the housing 3, a plunger hole 6 is provided on the plunger cavity 5, 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 to the number of plungers 7. The plunger cavity 5 is connected to the cylinder body, or the plunger cavity 5 and the cylinder body are an integrated manufacturing structure (i.e., the main body is composed of continuous materials), the plunger 7 can reciprocate in 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 accommodation space 4. The accommodation space 4 is provided with an eccentric wheel 12 and a thrust ring 13. The accommodation space 4 is also used to fill water or an aqueous solution. The water or the 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. A spring assembly (composed of a spring 10 and a spring bracket 9) is also provided in the accommodation space 4 to press the plunger 7 against the thrust ring 13.

[0034] When the eccentric wheel shaft rotates, the center of the eccentric wheel 12 moves away from the cylinder body, the spring 10 pushes the plunger 7 to move away from the cylinder body, the space that can accommodate fluid in the plunger hole 6 increases, and a negative pressure is generated compared to the pump water inlet position. At this time, the water inlet check valve 17 opens, and water or aqueous solution passes through the water pump water inlet, the main water inlet channel 14, the check valve water inlet channel 15, and the water inlet check valve 17 to the plunger hole 6 to achieve water absorption of the pump. When the center of the eccentric wheel 12 moves toward the cylinder body, the thrust ring 13 pushes the plunger 7 to move toward the cylinder body, the space that can accommodate fluid in the plunger hole 6 decreases, and the fluid pressure in the plunger hole 6 increases. Under the action of pressure, the water inlet check valve 17 is closed, and the water outlet check valve 18 is opened. The water or aqueous solution in the plunger hole 6 flows out through the water outlet check valve 18 to the check valve water outlet channel 16, and the cylinder body achieves water discharge of the pump. During the process of absorbing or draining water, 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, and the force interaction between the thrust ring 13 and the plunger 7 is achieved by means of rolling friction contact.

[0035] In this embodiment, the plunger cavity 5 and the liquid cylinder body are independent structures. The liquid cylinder body includes a liquid cylinder body main body 1 and a liquid cylinder body water inlet component 2. The liquid cylinder body main body 1 is provided with a water inlet check valve 17 and a water outlet check valve 18 and high and low pressure flow channels (including a check valve water inlet flow channel 15 and a check valve water outlet flow channel 16). The water inlet check valve 17 is arranged horizontally, and the water inlet of the water inlet check valve 17 is facing away from the housing 3. The water outlet check valve 18 is arranged vertically, and the water inlet of the water outlet check valve 18 faces downward. The water inlet flow channel 15, the water outlet flow channel 16, the water inlet check valve 17, the water outlet check valve 18 and the plunger 7 are in a one-to-one correspondence relationship. The number of the water inlet check valve 17 and the water outlet check valve 18 is greater than 2, and the water inlet check valve 17 and the water outlet check valve 18 are respectively installed on the liquid cylinder body in sequence along the direction parallel to the axis of the eccentric wheel.

[0036] The cylinder water inlet component 2 is provided with a main water inlet channel 14 parallel to the centerline of the eccentric wheel shaft, and the main water inlet channel 14 is directly connected to the water inlet of the water pump. The cylinder water inlet component 2 is provided with holes leading to each water inlet check valve 17 on the side facing the cylinder body 1; water or aqueous solution can directly pass from the water source through the water inlet of the water pump to the main water inlet channel 14, and enter the water inlet check valve 17 through the check valve water inlet channel 15. It should be noted that the water inlet of the water pump is also preferably provided on the cylinder water inlet component 2, and can also be provided on other components of the water pump.

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

[0038] A connecting flow channel 20 is also provided in the liquid cylinder body water inlet component 2, and a corresponding connecting flow channel 20 is also provided in the liquid cylinder body main body 1. The connecting flow channel 20 is arranged horizontally and perpendicular to the eccentric wheel axis direction. The fluid communication between the main water inlet channel 14 of the liquid cylinder body water inlet component 2 and the accommodating space 4 is realized through the connecting flow channel 20. Because the water inlet check valve 17 is connected to the main water inlet channel 14, the water inlet check valve 17 and the accommodating space 4 are also fluidly connected. In a preferred embodiment of the present invention, the connecting flow channel 20 is preferably in the shape of a long thin hole, and is preferably arranged in a plurality. Through these connecting flow channels 20, water or aqueous solution can enter the accommodating space 4 from the main water inlet channel 14 of the liquid cylinder body water inlet component 2, ensuring that there is always water in the accommodating space 4 to ensure the lubrication of the motion mechanism; if there is a lack of water in the accommodating space, it will cause the rapid damage of the water pump. Such a setting avoids the damage of the pump caused by artificial water filling of the water pump accommodating space, and significantly improves the convenience and safety of the water pump.

[0039] The motion mechanism arranged 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 working for a long time, these friction pairs will inevitably wear out. If the wear material (small debris generated by friction) is retained in the accommodating space 4 for a long time, it will aggravate the damage to the motion mechanism and needs to be discharged in time. Since the plunger 7 performs a pressurized motion in the plunger hole 6, the plunger 7 and the plunger hole 6 are sealed by a tiny gap. Although the sealing gap is very small, a small amount of high-pressure water can leak through the sealing gap during operation; because the volume of the accommodating space 4 is fixed, while water or aqueous solution enters the accommodating space 4 through the gap between the plunger 7 and the plunger cavity 5, the water in the accommodating space 4 will also be discharged from the accommodating space 4 through the connecting flow channel 20. More importantly, through the circulation of the fluid in the connecting flow channel 20, the wear material of the water pump motion mechanism can be taken out of the accommodating space 4, realizing the self-cleaning function of the water pump.

[0040] The water in the accommodating space 4 is stirred by the eccentric shaft, resulting in large pulsation and turbulent flow field. As in the traditional water supply scheme, if the water from the water source through the water inlet of the water pump first enters the shell, the flow will become turbulent due to the stirring of the eccentric wheel. The turbulently flowing water then enters the cylinder body, which will inevitably affect the stability of the water pump, increase the pulsation of the output high-pressure water, and increase the noise.

[0041] In this embodiment, since water or aqueous solution can directly enter the one-way valve water inlet channel 15 through the water pump inlet and the main water inlet channel 14, the water supply source of most of the one-way valve water inlet channel 15 no longer passes through the flow accommodation space 4, and is no longer directly affected by the stirring of the eccentric wheel shaft. This measure greatly improves the stability of the water inlet flow field. Although the connecting channel 20 still connects the main water inlet channel 14 and the accommodation space 4, theoretically, the fluid pulsation of the accommodation space 4 will still affect the flow field of the main water inlet channel 14 to a certain extent; but in practice, this influence can be further controlled to be negligible by optimizing the design of the connecting channel 20.

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

[0043] 1. The small flow channel cross-sectional area reduces the energy transmitted by the pulsation through the connecting flow channel 20;

[0044] 2. The flow resistance caused by small pore size and narrow gap converts pulsation energy into heat.

[0045] The research work carried out shows that: 1. When the minimum flow channel cross section of the connecting flow channel 20 is circular, and the area of ​​the flow channel cross section is less than half of the cross-sectional area of ​​the plunger hole 6, it can effectively reduce the influence of the pulsation of the accommodation space 4 on the flow field of the water inlet main flow channel 14 of the liquid cylinder body water inlet component 2, and improve the running stability of the water pump; and when the flow channel cross section remains unchanged, the longer the flow channel length, the better the flow field stability of the water inlet main flow channel 14. 2. When the minimum flow channel cross section of the connecting flow channel 20 is other shapes, such as a flow channel with a narrow gap, the flow resistance of the narrow gap can be further increased compared with a circular hole with the same flow channel cross-sectional area, so even if a narrow gap with a larger flow channel cross-sectional area is used, the influence of the pulsation of the accommodation space 4 on the flow field of the water inlet main flow channel 14 of the liquid cylinder body water inlet component 2 can be effectively suppressed; considering the constraints of the design space, the minimum flow channel cross-sectional area is preferably less than 3 times the cross-sectional area of ​​the plunger hole 6; and the longer the flow channel length used in the design, the narrower the gap, and the better the flow field stability of the water inlet main flow channel 14.

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

[0047] When the accommodation space is short of water, the connecting flow channel 20 replenishes the water to the accommodation space. The larger the flow channel cross section of the connecting flow channel 20, the faster the water replenishment is completed; in addition, a larger cross section of the connecting flow channel 20 also means that the wear and tear in the accommodation space is discharged more quickly. Therefore, the flow channel cross section area of ​​the connecting flow channel 20 is not the larger the better, nor the smaller the better. It is necessary to comprehensively consider various factors and finally verify it through experiments.

[0048] However, in actual applications, increasing the number of holes and reducing the cross-sectional area of ​​the holes usually achieves better results. The number of connecting channels 20 is defined as the sum of the number of channels connecting the water inlet check valve 17 and the accommodating space 4, which independently circulate water or aqueous solution in at least part of the flow section.

[0049] Usually processing a large number of small holes will increase the manufacturing cost. The present invention proposes a more economical and effective method to achieve this. Figure 2As shown, a porous material filter 21 can be arranged on the cylinder body or on the external pipeline; the porous material filter 21 is made of a material having a large number of holes inside and interconnected with each other, and the water inlet main channel 14 and the accommodating space 4 can be connected through these small holes, thereby realizing a collection of dense small-sized connecting channels 20. For the porous material filter 21, due to the small size and large number of holes, when water or aqueous solution passes from the accommodating space 4 to the water inlet main channel 14, the pulsation can be better attenuated. Porous materials can now be maturely prepared, such as porous ceramics, metal foams, etc., which can better control the size of the holes. In this embodiment, the average pore size of the porous material filter is preferably less than 3 mm.

[0050] It should be further explained that the communication channel 20 is not necessarily provided on the cylinder body. In special cases, the main water inlet channel 14 and the accommodating space can be fluidically connected through an external pipeline.

[0051] Since the water from the water source directly enters the water inlet check valve 17, the cooling of the moving mechanism in the accommodating space 4 can only be carried out by the water retained in the accommodating space 4. Therefore, the cooling capacity of the structure adopted by the present invention is significantly reduced compared with the traditional structure design of direct water flow in the accommodating space 4. However, since the cylinder body 1 can be made of metal with good thermal conductivity such as copper, and the water in the accommodating space 4 is stirred by the eccentric wheel shaft, the water and the cylinder body are in direct contact with the shell 3 side, and the heat exchange between the water and the cylinder body is sufficient. After the heat in the accommodating space 4 is transferred to the cylinder body through the water, the cylinder body further transfers the heat to the water that needs to be pressurized, and can also take away a large amount of heat. At the same time, the shell 3 is also made of metal material, and through the heat exchange between the shell 3 and the air, it also has a certain heat dissipation capacity. In addition, water or aqueous solution can also take away part of the heat through the flow of fluid in the connecting flow channel 20. Due to the action of multiple factors, the temperature rise of the water pump is still controllable. For a water pump with typical power, the actual temperature of the pump housing 3 does not exceed 10°C compared with the inlet water temperature, which can still meet most commercial and industrial application scenarios.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-pressure water pump based on water or aqueous solution lubrication, characterized in that: include: A water pump water inlet, a main water inlet channel, a cylinder body, a shell, a plunger cavity, a plunger, a driving mechanism and a connecting flow channel; a water inlet check valve and a water outlet check valve are arranged in the cylinder body; the driving mechanism includes an eccentric wheel shaft, and an eccentric wheel is arranged on the eccentric wheel shaft; the number of the plungers is greater than or equal to two, and plunger holes corresponding to the plungers are arranged in the plunger cavity, and the plungers can slide back and forth in the plunger holes; the cylinder body and the shell are fixedly connected, and the internal space formed after the cylinder body and the shell are connected is a receiving space, and the eccentric wheel is arranged in the receiving space, and the receiving space is also used to fill water or aqueous solution; The main water inlet channel connects the water pump inlet and the water inlet one-way valve. Through the main water inlet channel, water or aqueous solution can flow directly from the water pump inlet to the water inlet one-way valve without passing through the accommodating space to realize water supply; through the connecting flow channel, the fluid between the water inlet one-way valve and the accommodating 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 the connecting flow channels is greater than or equal to one; when the minimum flow channel cross-section of the connecting flow channel is a circle, the flow channel cross-sectional area is smaller than half of the cross-sectional area of ​​the plunger hole; when the minimum flow channel cross-sectional area of ​​the connecting flow channel is other shapes, the flow channel cross-sectional area is smaller than 3 times the cross-sectional area of ​​the plunger hole.

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 arranged between the main water inlet channel and the accommodating space. The interior of the porous material filter is provided with interconnected holes, and the holes form the connecting flow channel. After water or aqueous solution flows through the holes inside the porous material filter, fluid communication between the accommodating space and the main water inlet channel is achieved.

4. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that: The water inlet check valve is arranged horizontally, and the water inlet of the water inlet check valve faces away from the direction of 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 liquid cylinder body comprises a liquid cylinder body main body and a liquid cylinder body water inlet component. The plunger cavity and the liquid cylinder body are manufactured separately. The liquid cylinder body water inlet component, the liquid cylinder body main body and the plunger cavity are connected into a sandwich-type integrated structure by screws with the liquid 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: The outer peripheral surface of the eccentric wheel is sleeved with a thrust ring structure, and the thrust ring structure is rotatably connected to the eccentric wheel.

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