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

Abstract

A high-pressure water pump based on water or aqueous solution lubrication comprises a water pump water inlet, a hydraulic cylinder body, a shell, a plunger cavity, a plunger and a driving mechanism. A communicating flow channel for supplying water to the water inlet one-way valve is arranged between the accommodating space and the water inlet one-way valve; water or a water solution flows through the containing space through the water inlet of the water pump and then flows to the water inlet one-way valve through the communicating flow channel to achieve water supply of the water pump. According to the invention, sufficient cooling and lubrication of the movement mechanism in the accommodating space are realized. By means of the special design of the communication flow channel from the containing space to the hydraulic cylinder body and the communication flow channel with the specific size and shape such as small holes or slits, the flowing resistance of water or aqueous solution is increased, and therefore the influence on pumping of the water or aqueous solution due to flow field turbulence is reduced, high-pressure water can be stably output, and the pumping efficiency of the water or aqueous solution is improved. Operation noise of the water pump is reduced, and working stability of the water pump is improved.

Description

Technical Field

[0001] The invention relates to a high-pressure water pump lubricated by water or aqueous solution. Background Art

[0002] The water-lubricated high-pressure water pump lubricates and cools the moving mechanism through the water in the casing. It does not require the lubricating oil used by traditional water pumps, avoids environmental pollution, and can run maintenance-free for a long time. It is an ideal environmentally friendly power equipment.

[0003] In the prior art, as described in Patent ZL202321748625.7, the newly developed water-lubricated high-pressure water pump uses the rolling contact between the thrust ring sleeved on the eccentric wheel shaft and the plunger abutment surface to push the plunger to move in the plunger cavity to perform work, thereby pressurizing the water or aqueous solution. The water pump described in the patent lubricates and cools the motion mechanism through water or aqueous solution. Benefiting from the structural design without static pressure support, the water pump can provide higher pressure, and has a simple structure and low manufacturing cost.

[0004] The water inlet and outlet design of a water-lubricated high-pressure water pump is an important part of water pump research and development. A good water inlet and outlet design must ensure that the water fully lubricates and cools the power mechanism, and also ensures the quiet and stable operation of the water pump. As described in Patent 201510036848.4, the water-lubricated water pump described 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. After lubricating and cooling the moving mechanism in the space inside the shell, it enters the liquid cylinder body from 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 was found that the water pump using this water inlet method has high noise, the output high-pressure water has large pulsation, and the pump has poor working stability.

[0005] Further in-depth research found that after water or aqueous solution enters the shell, the eccentric wheel shaft rotates at high speed, stirring the water in the shell to flow rapidly and unstably. 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 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] Therefore, through the analysis of the current status of water-lubricated high-pressure water pump technology, how to solve the problems of high noise and poor working stability of existing water-lubricated high-pressure water pumps while ensuring that the lubrication and cooling capacity of the water pump remains unchanged, so as to make the high-pressure water pump work more stably and quietly, and provide stable, less pulsating pressurized water, 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. In the present invention, the high-pressure water pump comprises: a water pump water inlet, a liquid cylinder body, a shell, a plunger cavity, a plunger and a driving mechanism; a water inlet check valve and a water outlet check valve are arranged in the liquid cylinder body; the driving structure comprises an eccentric wheel shaft, and an eccentric wheel is arranged on the eccentric wheel shaft; at least one plunger is arranged, and a plunger hole corresponding to the plunger is arranged in the plunger cavity, and the plunger can reciprocate in the plunger hole; the liquid cylinder body is fixedly connected to the shell, and the internal space formed after the liquid 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;

[0011] A communication channel for supplying water to the water inlet check valve is provided between the accommodating space and the water inlet check valve; water or aqueous solution first flows through the accommodating space through the water inlet of the water pump, and then flows to the water inlet check valve through the communication channel to realize water supply by the water pump;

[0012] When the minimum flow channel cross section of the communicating flow channel is circular, the minimum flow channel cross section area of ​​the communicating flow channel is less than 1 / 4 of the cross section area of ​​a single plunger hole, and the number of the communicating flow channels is greater than or equal to 2;

[0013] When the minimum flow channel cross section of the communicating flow channel is in other shapes, the minimum flow channel cross section area of ​​the communicating flow channel is less than 1 times the cross section area of ​​a single plunger hole.

[0014] 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 accommodating space and the water inlet check valve, and the porous material filter has holes interconnected inside, 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 water inlet check valve is achieved.

[0015] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by the present invention, the average pore size of the holes belonging to the porous material filter element is less than 3 mm.

[0016] 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 is arranged in a direction away from the eccentric wheel shaft.

[0017] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by the present invention, the water outlet one-way valve is vertically arranged, and the water inlet of the water outlet one-way valve is arranged in the direction of the water inlet one-way valve.

[0018] 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.

[0019] Preferably, in the high-pressure water pump based on water or aqueous solution lubrication provided by the present invention, a main water inlet channel is provided on the water inlet component of the liquid cylinder body, the main water inlet channel is connected to the water inlet check valve, and the accommodating space is connected to the main water inlet channel through the connecting channel, so as to supply water to the main water inlet channel;

[0020] 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.

[0021] (III) Beneficial effects

[0022] In the above structural design:

[0023] 1. The present invention first introduces the water inlet of the water-lubricated high-pressure water pump into the accommodation space in the water pump, thereby achieving sufficient cooling and lubrication of the moving mechanism in the accommodation space. Through the special design of the connecting flow channel from the accommodation space to the liquid cylinder body, the connecting flow channel of specific size and shape such as small holes or slits is used to increase the flow resistance of water or aqueous solution, thereby reducing the impact of the flow field turbulence on the pumping of water or aqueous solution, so that high-pressure water can be output stably, reducing the running noise of the water pump and improving the working stability of the water pump;

[0024] 2. The present invention further proposes to realize the connecting flow channel through a porous material filter. The porous material filter can provide a dense small hole type connecting flow channel with better stable flow ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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:

[0026] Figure 1 It is a schematic structural diagram of a high-pressure water pump based on water or aqueous solution lubrication in one embodiment of the present invention;

[0027] Figure 2 It is a schematic structural diagram of a high-pressure water pump lubricated with water or aqueous solution in another embodiment of the present invention when a filter element is provided.

[0028] exist Figure 1 and Figure 2 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0029] Cylinder body 1, cylinder water inlet component 2, shell 3, accommodating space 4, plunger cavity 5, plunger hole 6, plunger 7, wear-reducing sleeve 8, spring bracket 9, spring 10, main shaft 11, eccentric wheel 12, thrust ring 13, water inlet main channel 14, water inlet channel 15, water outlet channel 16, water inlet check valve 17, water outlet check valve 18, screw 19, connecting channel 20, filter element 21, water pump water inlet 22. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Please refer to Figure 1 and Figure 2 ,in Figure 1 It is a schematic structural diagram of a high-pressure water pump based on water or aqueous solution lubrication in one embodiment of the present invention; Figure 2It is a schematic structural diagram of a high-pressure water pump lubricated with water or aqueous solution in another embodiment of the present invention when a filter element is provided.

[0033] The present invention provides a high-pressure water pump based on water or aqueous solution lubrication. In the present invention, the high-pressure water pump based on water or aqueous solution lubrication (hereinafter referred to as the high-pressure water pump) includes: a water pump water inlet 22, a liquid cylinder body (also called a pump head), a shell 3, a plunger cavity 5, a plunger 7 (a structural component that movably cooperates with the plunger cavity 5), and a driving mechanism (including an eccentric wheel shaft, the eccentric wheel shaft includes a main shaft 11, a plurality of eccentric wheels 12 are arranged on the main shaft 11, and a thrust ring 13 is arranged on the outer circumferential surface of the eccentric wheel 12).

[0034] The cylinder body and the housing 3 are fixedly connected together, and the internal space formed by the connection of the cylinder body and the housing 3 is the accommodation space 4. The plunger cavity 5 is arranged in the accommodation space 4, and the cylinder body and the plunger cavity 5 are fixedly connected or the cylinder body and the plunger cavity 5 are manufactured by integrated molding. A plunger hole 6 is arranged in the plunger cavity 5, and a wear-reducing sleeve 8 is arranged in the plunger hole 6. The plunger 7 and the plunger hole 6 are in sliding fit (specifically, the plunger 7 and the wear-reducing sleeve 8 are in sliding fit), and the plunger 7 reciprocates in the plunger hole 6.

[0035] A water inlet channel 15 and a water outlet channel 16, a water inlet check valve 17 and a water outlet check valve 18 are provided inside the liquid cylinder body; the water inlet channel 15 is connected to the water inlet of the water inlet check valve 17, and the water outlet channel 16 is connected to the water outlet of the water outlet check valve 18; when the check valve is not installed, the water inlet channel 15 is connected to the water outlet channel 16; the water inlet channel 15 and the water outlet channel 16 are also connected to the plunger hole 6 at the same time.

[0036] The driving structure includes an eccentric shaft and a thrust ring 13. The eccentrics 12 corresponding to the plungers 7 are fixed on the eccentric shaft. The outer circumferences of the eccentrics 12 are sleeved with thrust rings 13 corresponding to each other. The thrust rings 13 can rotate on the eccentrics 12. In addition, the present invention is provided with a main water inlet channel 14 on the cylinder body. When a plurality of water inlet channels 15 corresponding to each water inlet check valve 17 are provided, all the water inlet channels 15 are provided in parallel and communicated with the main water inlet channel 14.

[0037] Under the action of spring force (the present invention provides a spring assembly in the accommodating space 4, the spring assembly includes a spring bracket 9 and a spring 10, and the spring bracket 9 is provided on the plunger 7), the end face of the plunger 7 always keeps in contact with the thrust ring 13. When the eccentric wheel shaft is driven to rotate by the motor, the eccentric wheel 12 that rotates accordingly drives the center of the thrust ring 13 to also make a circular motion around the axis of the eccentric wheel shaft. When the thrust ring 13 makes a circular motion and the motion direction approaches the direction of the liquid cylinder body, the thrust ring 13 pushes the plunger 7 to move in the plunger hole 6 in the direction of the liquid cylinder body (away from the eccentric wheel shaft) while abutting and rolling contacting with the end face of the plunger 7, squeezing the water or aqueous solution in the plunger hole 6, at this time, the water inlet check valve 17 is closed, and the water outlet check valve 18 is opened, and the water or aqueous solution is pressurized and flows through the water outlet check valve 18 to be discharged from the water pump. When the thrust ring 13 makes a circular motion and moves away from the cylinder body, the spring 10 pushes the plunger 7 to move in the plunger hole 6 in the direction away from the cylinder body (towards the eccentric wheel shaft). Under the action of the spring force, the thrust ring 13 still abuts against the end face of the plunger 7 and rolls. At this time, the water inlet check valve 17 is opened, and the water outlet check valve 18 is closed, and water enters the plunger hole 6 through the water inlet check valve 17.

[0038] The eccentric wheel 12 and the thrust ring 13 are also arranged in the accommodating space 4, and the accommodating space 4 is used to be filled with 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.

[0039] The water inlet of the water pump can be arranged on the cylinder body, or on the housing 3 or other parts, and is preferably arranged on the housing 3.

[0040] In this embodiment, the liquid cylinder body is composed of two independent parts, namely the liquid cylinder body main body 1 and the liquid cylinder body water inlet part 2. The liquid cylinder body main body 1 is used to accommodate the water inlet check valve 17 and the water outlet check valve 18. Figure 1 and Figure 2As shown, in a specific embodiment of the present invention, the water inlet check valve 17 is placed horizontally, the water inlet of the water inlet check valve 17 is facing away from the eccentric wheel shaft, and the water outlet check valve 18 is placed in the vertical direction, and the water inlet of the water outlet check valve 18 is facing downward. The water inlet check valve 17, the water outlet check valve 18, the plunger 7, and the eccentric wheel 12 are in a one-to-one correspondence. The number of the water inlet check valve 17 and the water outlet check valve 18 is greater than or equal to 2, and they are arranged in sequence corresponding to the eccentric wheel 12 along the direction parallel to the eccentric wheel shaft. The liquid cylinder body water inlet component 2 is provided with a main flow channel parallel to the eccentric wheel axis direction. Water or aqueous solution first enters the water inlet main flow channel 14, and then passes along the water inlet main flow channel 14 to the water inlet of each water inlet check valve 17. Through the screw 19, the liquid cylinder body water inlet component 2, the liquid cylinder body main body 1 and the plunger cavity 5 are connected into one body, with the liquid cylinder body main body 1 as the middle layer, forming a "sandwich" sandwich type composite structure.

[0041] After the water or aqueous solution from the water source passes through the water pump inlet 22, it first enters the accommodation space 4. In the accommodation space 4, the heat and wear particles generated by the motion mechanism can be quickly dispersed into the water or aqueous solution through the stirring and mixing action of the eccentric wheel shaft. In this embodiment, a connecting flow channel 20 is provided on the cylinder body (including the cylinder body main body 1 and the cylinder body water inlet component 2). The connecting flow channel 20 connects the accommodation space 4 and the cylinder body water inlet component 2, so that the water or aqueous solution in the accommodation space 4 can pass through the connecting flow channel 20 and the main flow channel of the cylinder body water inlet component 2 to the water inlet of the water inlet check valve 17.

[0042] According to the traditional design, the flow channel connecting the accommodating space 4 and the water inlet check valve 17 of the liquid cylinder body is a circular flow channel hole with a sufficiently large cross-sectional area, which can ensure that the pressure loss of water or aqueous solution is small when flowing, and the equipment is easy to manufacture. The eccentric wheel shaft stirs the water or aqueous solution in the accommodating space 4 at a high speed, resulting in a turbulent flow field of the water flow in the accommodating space and large pulsation. If according to the traditional design, the water or aqueous solution in the accommodating space 4 directly enters the water inlet of the water inlet check valve 17 through the connecting flow channel 20, it will deteriorate the water inlet state of the water pump, resulting in increased noise of the water pump and poor output pressure stability. Because the water pump uses a check valve to distribute the flow, the water pump check valve uses the spring, valve plate and the changes in the inlet and outlet water pressure environment to work, because the valve plate has a small mass and the force of the spring is also small, under the pressure pulsation of the water or aqueous solution flow field, the water inlet of the water pump and the work of the check valve will be affected by the water flow fluctuation and the stability will deteriorate, the working noise of the water pump will increase, and the pressure fluctuation of the output high-pressure water will increase, which will seriously affect the use experience of the water pump.

[0043] The solution of the present invention to the above problem is: the connecting flow channel 20 between the accommodating space 4 and the water inlet component 2 of the liquid cylinder body is changed from a traditional round hole with a large cross-sectional flow channel to a collection of a large number of small cross-sectional flow channels. It should be noted that the number of the connecting flow channels 20 is defined as the sum of the number of flow channels that connect the water inlet check valve 17 and the accommodating space 4 and independently flow water or aqueous solution in at least a part of the flow section.

[0044] The flow of water in the small holes will greatly increase the flow resistance due to friction. The flow resistance can suppress the pulsation of the fluid and convert the pulsation energy into heat energy. Under the pressure difference available in the project, although the small holes can suppress the pulsation, the flow rate of water in the small holes is low and the flow rate is small. If a sufficient number of small holes are set in the waterway connecting the accommodating space 4 and the water inlet check valve 17, and water is circulated through these small holes at the same time, and the water flowing out of these small holes is collected, it is theoretically possible to provide a sufficient amount of water supply for the water pump water inlet check valve 17.

[0045] Research shows that when the minimum flow channel cross-section of the connecting flow channel 20 connecting the accommodating space 4 to the water inlet check valve 17 is circular (that is, when the connecting flow channel 20 is a circular hole structure), the minimum flow channel cross-sectional area must be at least less than 1 / 4 of the cross-sectional area of ​​a single plunger hole 6, and the number of flow channels is greater than or equal to 2; when the connecting flow channel 20 is a special shape, such as a circular channel or a narrow gap flow channel, because of the same cross-sectional area, the narrow gap has a greater flow resistance than the circular hole, so a flow channel with a larger cross-sectional area can be used, as long as the gap width is designed to be small enough and the gap is long enough. Taking into account the space restrictions of the engineering design, it is limited to using a non-circular flow channel cross-sectional shape, and the minimum flow channel cross-sectional area of ​​the connecting flow channel 20 (the minimum flow cross-sectional area of ​​the connecting flow channel 20) must be smaller than the cross-sectional area of ​​a single plunger hole 6.

[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] By preparing a large number of small holes or holes with narrow gaps on the liquid cylinder body to form a connecting flow channel, the processing cost will undoubtedly increase. A better implementation method is: a porous material filter 21 is set between the accommodating space 4 and the water inlet check valve 17. The porous material filter 21 can be set on the liquid cylinder body or on an external pipeline. The porous material can be a material with a network structure composed of mutually interpenetrating holes, with a large number of mutually interconnected holes inside, through which a connecting flow channel is formed. After water or aqueous solution flows from the accommodating space 4 through the holes inside the porous material filter 21, the fluid communication between the accommodating space 4 and the water inlet main flow channel 14 can be achieved. In the present invention, the porosity of the porous material filter can reach 90%. The porous material holes are usually small in size, and the pore size can be prepared and realized in the range of a few nanometers to a few millimeters. Common porous filter materials with millimeter pores that can be used for filtering include porous ceramics, metal foams, etc. The use of these porous materials in the connecting flow channel 20 is equivalent to setting a considerable number of small-sized flow channels in a low-cost manner. In order to meet the filtering effect, the average pore size of the small holes on the filter element 21 is limited to less than 3 mm.

[0048] 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 comprises a water inlet, a cylinder body, a shell, a plunger cavity, a plunger and a driving mechanism; a water inlet check valve and a water outlet check valve are arranged in the cylinder body; the driving structure comprises an eccentric wheel shaft, and an eccentric wheel is arranged on the eccentric wheel shaft; at least one plunger is arranged, and a plunger hole corresponding to the plunger is arranged in the plunger cavity, and the plunger can slide back and forth in the plunger hole; 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, and the eccentric wheel is arranged in the receiving space, and the receiving space is also used to fill water or aqueous solution; A communication channel for supplying water to the water inlet check valve is provided between the accommodating space and the water inlet check valve; water or aqueous solution first flows through the accommodating space through the water inlet of the water pump, and then flows to the water inlet check valve through the communication channel to realize water supply by the water pump; When the minimum flow channel cross section of the communicating flow channel is circular, the minimum flow channel cross section area of ​​the communicating flow channel is less than 1 / 4 of the cross section area of ​​a single plunger hole, and the number of the communicating flow channels is greater than or equal to 2; When the minimum flow channel cross section of the communicating flow channel is in other shapes, the minimum flow channel cross section area of ​​the communicating flow channel is less than 1 times the cross section area of ​​a single plunger hole.

2. 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 accommodating space and the water inlet check valve. The porous material filter has holes interconnected inside, and the holes form the connecting flow channel. Water or aqueous solution flows through the holes inside the porous material filter to achieve fluid communication between the accommodating space and the water inlet check valve.

3. The high-pressure water pump based on water or aqueous solution lubrication according to claim 2, characterized in that: The average pore size of the holes in the porous material filter element is less than 3 mm.

4. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that: The water inlet one-way valve is arranged horizontally, and the water inlet of the water inlet one-way valve is arranged in a direction opposite to the eccentric wheel shaft.

5. The high-pressure water pump based on water or aqueous solution lubrication according to claim 4, characterized in that: The water outlet one-way valve is arranged vertically, and the water inlet of the water outlet one-way valve is arranged toward the direction of the water inlet one-way valve.

6. The high-pressure water pump based on water or aqueous solution lubrication according to claim 4, 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.

7. The high-pressure water pump based on water or aqueous solution lubrication according to claim 6, characterized in that: The water inlet component of the liquid cylinder body is provided with a main water inlet channel, which is connected to a water inlet one-way valve. The accommodating space is connected to the main water inlet channel through the connecting channel for supplying water to the main water inlet channel.

8. The high-pressure water pump based on water or aqueous solution lubrication according to any one of claims 1 to 7, 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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