High-pressure water pump based on water or aqueous solution lubrication
By introducing a guide mechanism into the high-pressure water pump to limit the swing of the bracket, spring and plunger, the wear and noise problems caused by the swing of the bracket and spring are solved, and the reliability and service life of the pump are improved.
Patent Information
- Application Number
- CN202422087363.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In existing high-pressure water pumps, the swing of the bracket and spring causes wear, noise and vibration, affecting the reliability and service life of the pump, and may even cause structural damage under special working conditions.
A guide mechanism is introduced into the high-pressure water pump to limit the swing of the bracket, spring and plunger through the guide rod and guide hole, ensuring their movement stability and avoiding collision.
It effectively reduces adverse noise and vibration, improves pump reliability and service life, and prevents structural damage.
Smart Images
Figure CN223318032U_ABST
Abstract
Description
Technical Field
[0001] The utility model 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. Unlike reciprocating pumps that use oil to lubricate their power ends, water-lubricated high-pressure water pumps eliminate the need for lubricating oil in their drive components. Through a unique structural design, they require only water or an aqueous solution to lubricate and efficiently operate. Because they require no lubricating oil, water-lubricated high-pressure water pumps avoid environmental pollution and offer a longer, maintenance-free lifespan. They are expected to be widely used in high-pressure cleaning, high-pressure misting, fine mist fire extinguishing, seawater desalination, high-pressure deburring, and other fields.
[0003] The cylinder body is the component of the water pump that withstands high pressure. It contains high- and low-pressure fluid channels and a one-way valve. Each plunger corresponds to a suction valve and a discharge valve to distribute the fluids, allowing low-pressure water to flow in and high-pressure water to be discharged. The cylinder body also contains a plunger cavity, where the plunger slides to increase water pressure. The reciprocating movement of the plunger in the cavity is driven by a drive mechanism and a rebound mechanism. The drive mechanism drives the plunger to pressurize and discharge the water or aqueous solution in the cavity, while the rebound force of the rebound mechanism drives the plunger to draw water or aqueous solution into the cavity.
[0004] Existing high-pressure water pump drive mechanisms utilize a thrust structure mounted on a main shaft with an eccentric wheel to contact the plunger, driving the plunger's motion. Due to assembly and machining variations, as well as the flexural deformation of the main shaft under load, the contact stresses between the thrust structure and the plunger along the main shaft's axis are not completely uniform. This stress differential can cause the plunger to rotate or oscillate within the plunger cavity after being loaded, increasing wear on the contact surface between the thrust structure and the plunger, thus reducing the pump's service life. Furthermore, the water pump utilizes a spring mechanism to achieve plunger return, which is connected to one end of the plunger via a bracket. The spring has weak bending stiffness, so if the plunger rotates or oscillates, the bracket and the plunger contact, causing the plunger to also oscillate. Under extreme operating conditions, if oscillation is severe, two adjacent brackets and springs can collide due to the limited space within the pump body. Due to the high-speed movement of the plunger and bracket within the pump body, even minor contact can increase pump noise and vibration. In more serious cases, this can lead to severe damage to the pump structure.
[0005] Therefore, in order to improve product reliability and increase service life, while pursuing smaller pump products and higher pump power density, it is now urgent to solve the problem of how to limit the swing of the bracket, spring and plunger, especially to prevent the collapse consequences caused by the swing of the bracket and spring. Utility Model Content
[0006] The purpose of the utility model is to provide a high-pressure water pump based on water or aqueous solution lubrication, in which a guide mechanism is provided, which can effectively limit the swing of the bracket, spring and plunger, prevent collision, reduce adverse noise and vibration, and improve the reliability and service life of the pump.
[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:
[0008] A high-pressure water pump lubricated with water or an aqueous solution comprises: a cylinder body, a housing, at least one plunger, a drive mechanism, a rebound mechanism, and a guide mechanism; the cylinder body is connected to the housing, and an accommodating space is formed therein; the plunger, the drive mechanism, the rebound mechanism, and the guide mechanism are disposed within the accommodating space, and the accommodating space is also used to be filled with water or an aqueous solution;
[0009] The cylinder body is provided with a plunger cavity corresponding to the plunger one by one, one end of the plunger extends into the plunger cavity and cooperates with the plunger cavity, and the other end cooperates with the driving mechanism;
[0010] The driving mechanism includes: a main shaft, an eccentric structure provided on the main shaft and corresponding to the plunger one-to-one, a thrust structure sleeved on the outer peripheral side of the eccentric structure, the thrust structure being rotatably connected to the eccentric structure, and the thrust structure and the eccentric structure forming a sliding friction pair; the thrust structure is used to contact the other end of the plunger to drive the plunger to move along the extension direction of the axis of the plunger cavity, thereby achieving pressurized discharge of water or aqueous solution in the plunger cavity;
[0011] The rebound mechanism is provided in a one-to-one correspondence with the plunger, and each rebound mechanism includes a bracket and a spring provided on the outer peripheral side of the plunger cavity. The bracket is connected to the end of the plunger facing the driving mechanism, and the axis of the spring is provided parallel to the axis of the plunger cavity. The spring is used to apply a rebound force to the bracket so that the plunger moves in the plunger cavity to absorb water or aqueous solution;
[0012] At least one of the plungers is correspondingly provided with the guide mechanism, and the guide mechanism includes a guide rod and a guide hole that are coaxially arranged and slidably matched with each other, and the axis of the guide hole is parallel to the axis of the plunger cavity, wherein, in the extension direction of the axis of the plunger cavity, the position of the guide hole and the bracket is relatively fixed, and the position of the guide rod and the liquid cylinder body is relatively fixed; or, in the extension direction of the axis of the plunger cavity, the position of the guide hole and the liquid cylinder body is relatively fixed, and the position of the guide rod and the bracket or the plunger is relatively fixed.
[0013] In the above-mentioned high-pressure water pump based on water or aqueous solution lubrication, one end of the guide rod extends into the guide hole, and the outer peripheral wall of the guide rod is in sliding contact with the guide hole, and the two can slide relative to each other only in the extension direction of the axial centerline of the plunger cavity; in the circumferential direction of the axial centerline of the plunger cavity, the guide rod or guide sleeve can exert force on the bracket and the plunger, which can limit the rotation and swing of the bracket and the plunger, ensure the stability of the bracket, spring and plunger movement, avoid collision between adjacent brackets and springs, and help improve the reliability and service life of the pump, and reduce adverse noise, vibration, etc.
[0014] Optionally, in the extension direction of the axial centerline of the plunger cavity, the guide hole and the position of the liquid cylinder body are relatively fixed, and the guide rod and the bracket are relatively fixed, the spring is arranged on the side of the bracket away from the driving mechanism, and the rebound mechanism also includes a spring seat corresponding to the spring one by one, the spring seat extends along a first direction, and the first direction is parallel to the extension direction of the axial centerline of the plunger cavity, a part of the spring is sleeved on the outer peripheral side of the spring seat and is slidably connected to the spring seat, and the end face of one end of the spring sleeved on the spring seat is pressed on the spring seat; the spring seat is provided with the guide hole, the guide rod is located in the inner ring of the spring, one end of the guide rod extends into the guide hole, and the other end of the guide rod is fixed to the bracket.
[0015] Optionally, in the extension direction of the axial centerline of the plunger cavity, the guide hole and the position of the liquid cylinder body are relatively fixed, and the position of the guide rod and the bracket are relatively fixed, at least one guide hole is provided on the side wall of the circumference of the plunger cavity, one end of the guide rod extends into the guide hole, and the other end of the guide rod is fixed to the bracket.
[0016] Optionally, when the guide hole and the cylinder body are relatively fixed in position, and the guide rod and the plunger are relatively fixed in position, at least one guide hole is provided on the side wall around the plunger cavity, one end of the guide rod extends into the guide hole, and the other end of the guide rod is fixedly connected to an auxiliary frame, and the auxiliary frame is fixedly connected to the plunger.
[0017] Optionally, in the extension direction of the axial centerline of the plunger cavity, the guide hole and the bracket are relatively fixed in position, and the guide rod and the cylinder body are relatively fixed in position, the spring is arranged on the side of the bracket away from the driving mechanism, and the bracket is provided with a guide sleeve on the side facing the cylinder body, a part of the spring is sleeved on the outer peripheral side of the guide sleeve and is slidably connected to the guide sleeve; the guide sleeve has an inner hole, the axial centerline of the inner hole is parallel to the axial centerline of the plunger cavity, the inner hole forms the guide hole, one end of the guide rod extends into the guide hole, and the other end is fixed to the cylinder body.
[0018] Optionally, the guide sleeve is configured as a friction sleeve, and the friction sleeve is made of wear-resistant material. A through hole corresponding to the inner hole of the spring is provided on the bracket, and one end of the friction sleeve is inserted into the through hole and fixedly connected to the bracket. An annular stop edge is provided on the outer peripheral side of the friction sleeve, and the annular stop edge is located on the side of the bracket facing the liquid cylinder body, and is in contact and pressed with the surface of the bracket facing the liquid cylinder body.
[0019] Optionally, a friction sleeve is nested in the guide hole, the friction sleeve is made of wear-resistant material, and the guide rod is in sliding fit with the friction sleeve.
[0020] Optionally, the guide rod is made of stainless steel, and the inner wall of the guide hole is made of fiber-reinforced thermoplastic material.
[0021] Optionally, two guide mechanisms are provided, and the two guide mechanisms are circumferentially spaced apart around the axial center line of the plunger cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.
[0023] Figure 1 A schematic cross-sectional view of a high-pressure water pump lubricated with water or aqueous solution provided in an embodiment of the present invention;
[0024] Figure 2 A schematic cross-sectional view of a high-pressure water pump lubricated with water or aqueous solution provided in an embodiment of the present invention;
[0025] Figure 3 A schematic cross-sectional view of a high-pressure water pump lubricated with water or aqueous solution provided in an embodiment of the present invention;
[0026] Figure 4 A schematic cross-sectional view of a high-pressure water pump lubricated with water or aqueous solution provided in an embodiment of the present invention;
[0027] Figure 5 The present invention provides a schematic cross-sectional view of a high-pressure water pump lubricated with water or aqueous solution.
[0028] Icons: 1-cylinder body; 2-plunger; 3-driving mechanism; 4-rebound mechanism; 5-guide rod; 6-guide hole; 7-housing; 8-suction valve; 9-drain valve; 11-plunger chamber; 12-first chamber; 13-second chamber; 14-fluid channel; 21-auxiliary frame; 31-spindle; 32-eccentric structure; 33-thrust structure; 34-wear-resistant layer; 41-spring; 42-bracket; 43-spring seat; 44-guide sleeve; 61-friction sleeve. DETAILED DESCRIPTION
[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with examples. 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 can 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 part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.
[0030] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions 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 direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected", "connected", and "set" 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.
[0031] refer to Figures 1 to 4 As shown, the utility model provides a high-pressure water pump based on water or aqueous solution lubrication, including: a liquid cylinder body 1, a shell 7, at least one plunger 2, a drive mechanism 3, a rebound mechanism 4, and a guide mechanism; the liquid cylinder body is connected to the shell, and an accommodating space is formed inside; the plunger 2, the drive mechanism 3, the rebound mechanism 4, and the guide mechanism are arranged in the accommodating space, and the accommodating space is also used to fill water or aqueous solution.
[0032] Among them, the cylinder body 1 is provided with a plunger cavity 11 corresponding to the plunger 2 one by one, one end of the plunger 2 extends into the plunger cavity 11 and cooperates with the plunger cavity 11, and the other end cooperates with the driving mechanism 3. Specifically, the driving mechanism 3 includes: a main shaft 31, and an eccentric structure 32 provided on the main shaft 31 and corresponding to the plunger 2 one by one. One end of the main shaft 31 can be connected to a power device, and the power device provides power to the main shaft 31 so that the main shaft 31 rotates and drives the eccentric structure 32 to rotate. The power device can be a motor. A thrust structure 33 is provided on the outer peripheral side of the eccentric structure 32. The thrust structure 33 is rotatably connected to the eccentric structure 32, and the thrust structure 33 and the eccentric structure 32 form a sliding friction pair; preferably, the eccentric structure 32 is an eccentric wheel, and the thrust structure 33 is a thrust ring. The thrust ring is provided on the outer peripheral side of the eccentric wheel, and the eccentric wheel and the thrust ring are coaxially arranged. A wear-resistant layer 34 is provided between the thrust ring and the eccentric to reduce friction and wear between the two. The thrust structure 33 is used to roll with the other end of the plunger 2, driving the plunger 2 along the axis of the plunger cavity 11 to achieve pressurized discharge of water or aqueous solution in the plunger cavity 11.
[0033] A corresponding rebound mechanism 4 is provided for each plunger, and each rebound mechanism 4 includes a spring 41 provided on the outer peripheral side of the plunger cavity 11, and a bracket 42, wherein the number of springs is preferably two, and the two springs can be provided at intervals on the outer peripheral side of the plunger cavity. The bracket 42 is connected to one end of the plunger 2 facing the drive mechanism 3. The axis of the spring 41 is provided parallel to the axis of the plunger cavity 11. For example, the spring can be provided on the side of the bracket away from the drive mechanism, and the spring is located between the bracket and the liquid cylinder body. Preferably, one end of the spring 41 can be provided to be connected to the liquid cylinder body 1, and the other end to be connected to the bracket 42. The spring 41 is used to apply a rebound force to the bracket 42, so that the plunger 2 moves in the plunger cavity 11 to absorb water or an aqueous solution.
[0034] The cylinder body 1 is also provided with one-way valves, arranged in pairs, corresponding one-to-one with the plunger cavities 11. Each pair of one-way valves includes a suction valve 8 and a drain valve 9. For each corresponding pair of one-way valves and plunger cavities, the cylinder body 1 is provided with a first chamber 12 for accommodating and mounting the suction valve 8, a second chamber 13 for accommodating and mounting the drain valve 9, a fluid channel 14 connecting the first and second chambers 12, 13, and a cylinder body liquid inlet. One end of the fluid channel 14 is connected to the liquid outlet of the suction valve 8, and the other end is connected to the liquid inlet of the drain valve 9. One end of the cylinder body liquid inlet communicates with the first chamber 12 and the liquid inlet of the suction valve 8, while the other end of the cylinder body liquid inlet communicates with the accommodating space of the housing 7. The plunger cavity 11 is connected to the fluid channel 14.
[0035] Specifically, when plunger 2 pressurizes the water, the thrust ring pushes plunger 2 away from spindle 31. As the water pressure in plunger chamber 11 increases, suction valve 8 closes and drain valve 9 opens, allowing water in plunger chamber 11 to flow out of the pump through fluid passage 14 and drain valve 9. At this point, spring 41 is compressed and in a charged state, providing a rebound force for plunger 2 during its return stroke. Therefore, when plunger 2 returns, the rebound force of spring 41 drives plunger 2 toward spindle 31 in the direction of its axis, reducing the pressure in plunger chamber 11. Suction valve 8 opens, allowing water or an aqueous solution in housing 7 to flow into plunger chamber 11 through suction valve 8 and fluid passage 14.
[0036] For each plunger, at least one plunger is provided with a corresponding guide mechanism. The guide mechanism includes a guide rod 5 and a guide hole 6 that are coaxially arranged and slide-fit with each other, and the axis of the guide hole 6 is arranged parallel to the axis of the plunger cavity 11. Along the reciprocating motion direction of the plunger, when the water pump is working, the guide hole 6 and the plunger 2 are relatively fixed in position, and the guide rod 5 and the liquid cylinder body 1 are relatively fixed in position; or, the guide hole 6 and the liquid cylinder body 1 are relatively fixed in position, and the guide rod 5 and the plunger 2 are relatively fixed in position. One end of the guide rod 5 extends into the guide hole 6, and the outer peripheral wall of the guide rod 5 contacts and fits with the guide hole 6, and the guide rod 5 and the guide hole 6 slide together, and the two can slide relative to each other only in the extension direction of the axis of the plunger cavity 11. The plunger 2 is within the plunger cavity 11, and the guide rod 5 and guide hole 6 are circumferentially oriented with respect to the axis of the plunger cavity 11. The guide rod and guide hole cooperate to exert a force on the bracket and plunger, thereby restricting the plunger 2 and bracket 42, reducing or eliminating the degree of rotation or swinging of the plunger 2 and bracket 42 about the axis of the plunger cavity 11. As a result, when the thrust structure 33 contacts the plunger 2 to push the plunger 2 into motion, the smoothness of the movement of the plunger 2 and bracket 42 is improved, contact wear between the plunger and the thrust ring is reduced, and collisions between adjacent brackets 42 are avoided. Furthermore, collisions between adjacent springs 41 caused by the brackets driving the springs 41 to swing are prevented, thereby improving the reliability and service life of the pump and reducing undesirable noise and vibration.
[0037] Specifically, regarding the connection between the end of the plunger 2 facing the drive mechanism 3 and the bracket 42, it is preferred that the end of the plunger 2 facing the drive mechanism 3 is fixedly connected to the bracket 42. However, even if the bracket 42 and the plunger 2 are not completely fixed, the provision of the guide mechanism is also beneficial. For example, Figure 1As shown, the plunger 2 is designed to have a larger dimension perpendicular to the axis of the plunger cavity 11 at one end facing the drive mechanism 3, and a smaller dimension perpendicular to the axis of the plunger cavity 11 at the other end facing the plunger cavity 11; the interface with varying dimensions forms a shoulder. The bracket 42 can be fitted onto the outer peripheral surface of the small end of the plunger through a clearance fit, and under the push of the spring, the plunger is pushed back by contact with the shoulder. After providing the guide hole and the guide rod, the structure can also suppress the rotation or swing of the bracket and the spring; since the bracket is pressed against the shoulder of the plunger 2 by the spring, there is friction between the bracket and the shoulder of the plunger 2, which can also reduce the degree of rotation or swing of the plunger due to the influence of friction.
[0038] Based on the above-mentioned high-pressure water pump lubricated with water or aqueous solution, there are multiple options for the specific arrangement of the guide rods and guide holes corresponding to each plunger, such as the following:
[0039] Method 1:
[0040] like Figure 1 As shown, a guide rod 5 is fixed to a bracket 42, and a guide hole 6 is fixed to the cylinder body 1. In the direction of the reciprocating motion of the plunger, since the bracket 42 and the plunger 2 remain in a fixed position relative to each other, the guide rod 5 and the plunger 2 are also relatively fixed. Specifically, the rebound mechanism 4 also includes a spring seat 43 corresponding to the spring 41. The spring seat 43 extends along a first direction that is parallel to the direction of extension of the axis of the plunger cavity 11. A portion of the spring 41 is sleeved on the outer periphery of the spring seat 43 and is slidably connected to the spring seat 43. The end surface of one end of the spring 41 sleeved on the spring seat 43 is pressed against the spring seat 43. At least one spring seat 43 is provided with a guide hole 6. The guide rod 5 is located on the inner ring of the spring 41. One end of the guide rod 5 extends into the guide hole 6, and the other end of the guide rod 5 is fixed to the bracket 42. Integrating the guide mechanism into the rebound mechanism 4 can effectively save installation space and effectively increase the stability of the spring 41.
[0041] Method 2:
[0042] like Figure 2 As shown, guide rod 5 is fixed relative to bracket 42, and guide hole 6 is fixed relative to cylinder body 1. Since bracket 42 and plunger 2 remain in a fixed position relative to each other along the direction of the plunger's reciprocating motion, the positions of guide rod 5 and plunger 2 are also fixed relative to each other. Specifically, at least one guide hole 6 is provided on the sidewall surrounding plunger cavity 11. Guide rod 5 and guide hole 6 are arranged in a one-to-one correspondence. One end of guide rod 5 extends into guide hole 6, and the other end of guide rod 5 is fixed to bracket 42. The direct placement of guide hole 6 on cylinder body 1 increases the strength and rigidity of the guide mechanism, improving operational stability.
[0043] Method 3:
[0044] like Figure 3 As shown, a guide rod 5 is provided to be fixed relative to the plunger 2, and a guide hole 6 is fixed relative to the cylinder body 1; specifically, at least one guide hole 6 is provided on the side wall of the plunger cavity 11, one end of the guide rod 5 extends into the guide hole 6, and the other end of the guide rod 5 is fixedly connected to an auxiliary frame 21; the auxiliary frame 21 is fixedly connected to the plunger 2, and the auxiliary frame 21 is located on the side of the bracket 42 away from the eccentric structure 32, and the guide rod 5 is fixed by the auxiliary frame 21, which is equivalent to "holding" the plunger 2.
[0045] Method 4:
[0046] like Figure 4 As shown, a guide rod 5 is fixed relative to the cylinder body 1, and a guide hole 6 is fixed relative to the bracket 42. In the direction of the plunger's reciprocating motion, since the bracket 42 and plunger 2 remain in a fixed position relative to each other, the guide hole 6 and plunger 2 are also fixed relative to each other. A guide sleeve is provided on the side of the bracket 42 facing the cylinder body. A portion of the spring is sheathed around the outer periphery of the guide sleeve and is slidably connected to the guide sleeve. The guide sleeve has an inner hole, the axis of which is parallel to the axis of the plunger cavity. The inner hole serves as a guide hole. One end of the guide rod extends into the guide hole, and the other end is fixed to the cylinder body.
[0047] On the basis of the above-mentioned high-pressure water pump based on water or aqueous solution lubrication, in water environment conditions, in order to make the friction sliding between the guide rod and the guide hole more stable, avoid creeping phenomenon and extend service life; Figure 2 As shown, a friction sleeve 61 is nested within the guide hole 6. The guide rod 5 and the friction sleeve 61 are slidably engaged, and the guide rod 5 extends into the inner hole of the friction sleeve 61. The friction sleeve 61 is made of a wear-resistant material and has the properties of increased lubricity and wear resistance, which can reduce friction and wear of the friction pair. This allows the guide rod 5 and the inner hole of the friction sleeve 61 to engage smoothly, ensuring friction stability. For example, the wear-resistant material can be plastic, such as polytetrafluoroethylene.
[0048] Among them, in the above-mentioned fourth method, in order to further simplify the structure of the guide mechanism, as Figure 5 As shown, the friction sleeve 61 can be directly reused as a guide sleeve. The friction sleeve is made of wear-resistant material. The size and thickness of the friction sleeve 61 are relatively large to ensure structural strength. The inner hole of the friction sleeve 61 forms a guide hole 6. A through hole opposite to the inner hole of the spring 41 is provided on the bracket 42. The end of one end of the friction sleeve 61 is inserted into the through hole and fixed to the bracket 42. An annular retaining edge is provided on the outer peripheral side of the friction sleeve 61. The annular retaining edge is provided on the side of the bracket 42 facing the liquid cylinder body 1 and contacts and presses with the surface of the bracket 42 facing the liquid cylinder body 1, so that the friction sleeve 61 and the bracket 42 are firmly connected.
[0049] Specifically, the material of the above-mentioned guide rod can be stainless steel, and the inner wall material of the guide hole can be fiber-reinforced thermoplastic material. For example, the inner wall material of the guide hole can be polyetheretherketone, polyphenylene sulfide, polyamide, or polyarylether. By adding fiber, graphite, polytetrafluoroethylene, etc. to the plastic, the tribological properties can be effectively improved.
[0050] In one possible implementation, two guide mechanisms are provided for each plunger in the above-mentioned high-pressure water pump based on water or aqueous solution lubrication, and the two guide mechanisms are circumferentially spaced around the axial center line of the plunger cavity, which can better prevent the plunger from rotating or swinging and increase the movement stability of the plunger.
[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A high-pressure water pump based on water or aqueous solution lubrication, characterized in that: include: A liquid cylinder, a housing, at least one plunger, a driving mechanism, a rebound mechanism, and a guide mechanism; the liquid cylinder is connected to the housing to form an accommodating space; The plunger, the driving mechanism, the rebound mechanism, and the guide mechanism are arranged in the accommodating space, and the accommodating space is also used to be filled with water or an aqueous solution; The cylinder body is provided with a plunger cavity corresponding to the plunger one by one, one end of the plunger extends into the plunger cavity and cooperates with the plunger cavity, and the other end cooperates with the driving mechanism; The driving mechanism includes: a main shaft, an eccentric structure provided on the main shaft and corresponding to the plunger one-to-one, a thrust structure sleeved on the outer peripheral side of the eccentric structure, the thrust structure being rotatably connected to the eccentric structure, and the thrust structure and the eccentric structure forming a sliding friction pair; the thrust structure is used to contact the other end of the plunger to drive the plunger to move along the extension direction of the axis of the plunger cavity, thereby achieving pressurized discharge of water or aqueous solution in the plunger cavity; The rebound mechanisms are arranged in a one-to-one correspondence with the plungers, and each rebound mechanism includes a bracket and a spring arranged on the outer peripheral side of the plunger cavity; The bracket is connected to one end of the plunger facing the driving mechanism; the axis of the spring is arranged parallel to the axis of the plunger cavity, and the spring is used to apply a rebound force to the bracket so that the plunger moves in the plunger cavity to absorb water or aqueous solution; At least one of the plungers is correspondingly provided with the guide mechanism, and the guide mechanism includes a guide rod and a guide hole that are coaxially arranged and slidably matched with each other along the extension direction of the axial centerline of the plunger cavity, the axial centerline of the guide hole is parallel to the axial centerline of the plunger cavity, and the guide rod and the guide hole are located in the circumferential direction of the axial centerline of the plunger cavity; in the extension direction of the axial centerline of the plunger cavity, the position of the guide hole and the plunger is relatively fixed, and the position of the guide rod and the liquid cylinder body is relatively fixed; or, in the extension direction of the axial centerline of the plunger cavity, the position of the guide hole and the liquid cylinder body is relatively fixed, and the guide rod and the plunger are relatively fixed.
2. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that: In the extension direction of the axial centerline of the plunger cavity, the guide hole and the position of the liquid cylinder body are relatively fixed, and the guide rod and the position of the plunger are relatively fixed; the spring is located on the side of the bracket away from the driving mechanism, and the rebound mechanism also includes a spring seat corresponding to the spring one by one, and the spring seat extends along a first direction, and the first direction is parallel to the extension direction of the axial centerline of the plunger cavity; a part of the spring is sleeved on the outer peripheral side of the spring seat and is slidably connected to the spring seat, and the end face of one end of the spring sleeved on the spring seat is pressed against the spring seat; at least one of the spring seats is provided with the guide hole, and the guide rod is located at the inner ring of the spring, one end of the guide rod extends into the guide hole, and the other end of the guide rod is fixed to the bracket.
3. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that: In the extension direction of the axial centerline of the plunger cavity, the guide hole and the position of the liquid cylinder body are relatively fixed, and the guide rod and the position of the plunger are relatively fixed; at least one guide hole is provided on the side wall of the circumference of the plunger cavity, one end of the guide rod extends into the guide hole, and the other end of the guide rod is fixed to the bracket.
4. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that: The guide hole is relatively fixed to the position of the liquid cylinder body, and the guide rod is relatively fixed to the position of the plunger; at least one guide hole is provided on the side wall around the plunger cavity, one end of the guide rod extends into the guide hole, and the other end of the guide rod is fixedly connected to an auxiliary frame, and the auxiliary frame is fixedly connected to the plunger.
5. The high-pressure water pump based on water or aqueous solution lubrication according to claim 1, characterized in that: In the extension direction of the axis of the plunger cavity, the guide hole and the plunger are relatively fixed in position, and the guide rod and the cylinder body are relatively fixed in position; the spring is located on the side of the bracket away from the driving mechanism, and a guide sleeve is provided on the side of the bracket facing the cylinder body, and a part of the spring is sleeved on the outer peripheral side of the guide sleeve and is slidably connected to the guide sleeve; the guide sleeve has an inner hole, the axis of the inner hole is parallel to the axis of the plunger cavity, and the inner hole forms the guide hole, one end of the guide rod extends into the guide hole, and the other end is fixed to the cylinder body.
6. The high-pressure water pump based on water or aqueous solution lubrication according to claim 5, characterized in that: The guide sleeve is configured as a friction sleeve, and the friction sleeve is made of wear-resistant material. A through hole corresponding to the inner hole of the spring is provided on the bracket, and one end of the friction sleeve is inserted into the through hole and fixedly connected to the bracket. An annular retaining edge is provided on the outer peripheral side of the friction sleeve, and the annular retaining edge is located on the side of the bracket facing the liquid cylinder body, and is in contact and pressed with the surface of the bracket facing the liquid cylinder body.
7. The high-pressure water pump based on water or aqueous solution lubrication according to any one of claims 1 to 5, characterized in that: A friction sleeve is nested in the guide hole, the friction sleeve is made of wear-resistant material, and the guide rod is in sliding cooperation with the friction sleeve.
8. The high-pressure water pump based on water or aqueous solution lubrication according to any one of claims 1 to 6, characterized in that: The guide rod is made of stainless steel, and the inner wall of the guide hole is made of plastic material.
9. The high-pressure water pump based on water or aqueous solution lubrication according to any one of claims 1 to 6, characterized in that: The number of the guide mechanisms is two, and the two guide mechanisms are circumferentially spaced and distributed around the axis of the plunger cavity.