High-durability swash plate plunger water pump

Abstract

The utility model provides a high-durability swash plate plunger water pump which comprises a shell, a main shaft, a cylinder body, a swash plate and a return plate, a floating plate and a valve plate are arranged on the right side of the cylinder body, a plunger is installed in the cylinder body in a sliding mode, the end of the plunger is installed on the return plate through a sliding shoe, a front end cover is arranged on the left side of the shell, and a rear tail cover is arranged on the right side of the shell. The main shaft extends from the front end cover, penetrates through the shell and extends into the rear tail cover, a front shaft seal is arranged at the left end of the main shaft, and a rear shaft seal is arranged at the right end of the main shaft; a front support bearing is mounted on the front end cover and positioned on the outer side of the front shaft seal; a rear supporting bearing is installed on the rear tail cover and located on the outer side of the rear shaft seal, a bearing supporting part is independent from a medium, the rolling bearing has better supporting performance, the rotating state of a main shaft, a cylinder body and other components can be effectively improved, vibration is reduced, meanwhile, the rolling bearing has the axial limiting capacity, movement of the main shaft is reduced, and internal leakage of the water pump is reduced.

Description

Technical Field

[0001] The utility model relates to the field of fluids, in particular to a high-durability swash plate plunger water pump. Background Art

[0002] Water pumps are typically used to transport high-pressure, low-viscosity, corrosive fluids. Axial piston pumps are a typical application in seawater reverse osmosis treatment processes. Because the transported media are somewhat corrosive and the application conditions are unique, the pump components must have long maintenance cycles, ensuring high efficiency, high-pressure delivery, and high reliability and a long lifespan.

[0003] The structure of the water pump used in the existing technology is mostly improved from the quantitative pump for conveying hydraulic oil. The operating environment of the oil pump is much better than that of the water pump. Therefore, the existing water pump has the characteristics of low reliability and high failure rate. In order to avoid the influence of corrosive media such as seawater on the bearings, the moving components of the existing water pump are mostly supported by sliding bearings. However, on the one hand, the sliding support has weak support, and the moving parts may still have vibration or abnormal wear and other faults during operation. On the other hand, the sliding bearing does not have the ability to limit axially, which causes a certain amount of string movement of the main shaft during operation, resulting in a large amount of leakage in the water pump system. Utility Model Content

[0004] The technical problem to be solved by the present utility model is that the sliding bearings used in existing water pumps have weak supporting performance and cannot be axially positioned, resulting in large main shaft string movement and large internal leakage of the water pump. The present utility model provides a high-durability swash plate plunger water pump to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a high-durability swash plate plunger water pump, comprising a housing, a main shaft arranged in the housing, a cylinder body arranged in the housing and sleeved on the main shaft, a swash plate arranged on the left side of the cylinder body, a return plate slidably fitted on the swash plate, a floating plate and a distribution plate are arranged on the right side of the cylinder body, a plunger is slidably installed in the cylinder body, and the end of the plunger is installed on the return plate through a sliding shoe, a front end cover is provided on the left side of the housing, and a rear tail cover is provided on the right side of the housing; the main shaft extends from the front end cover, passes through the housing and extends into the rear tail cover, a front shaft seal is provided on the left end of the main shaft, and a rear shaft seal is provided on the right end; a front support bearing is installed on the front end cover at the outside of the front shaft seal; a rear support bearing is installed on the rear tail cover at the outside of the rear shaft seal.

[0006] Furthermore: the front support bearing and the rear support bearing are ball bearings.

[0007] Furthermore: a ball joint is slidably installed on the main shaft, a mounting hole is penetrated on the upper part of the cylinder body, a push rod and a spring are axially arranged in the mounting hole, and the spring drives the push rod to push the ball joint so that the return plate is tightly attached to the swash plate.

[0008] Furthermore, a sliding ring is embedded in the center of the ball joint, and the sliding ring is sleeved and installed on the outer periphery of the main shaft. The material of the sliding ring is polyetheretherketone.

[0009] Furthermore: a front bearing seat is provided on the front end cover, and the front support bearing is installed in the front bearing seat; on the front bearing seat, a dust cover is installed on the outside of the front support bearing, and the dust cover is provided with a dust ring that is in sealing contact with the main shaft.

[0010] Furthermore: a rear bearing seat is provided on the rear tail cover, and the rear support bearing is installed in the rear bearing seat; a rear cover is installed on the rear bearing seat at the outer side of the rear support bearing.

[0011] The beneficial effect of the present invention is that the high-durability swash plate plunger water pump of the present invention separates the bearing support part from the medium, adopts rolling bearings to replace the sliding bearings of the existing water pump, isolates the corrosion of the medium to the bearing support parts or abnormal wear caused by impurities, improves the bearing support life, and the rolling bearings have better supporting performance, which can effectively improve the rotation state of components such as the main shaft and cylinder body, reduce vibration, and at the same time, the rolling bearings have axial limiting ability, reduce the string movement of the main shaft, and reduce internal leakage of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a full cross-sectional view of a high-durability swash plate plunger water pump of the utility model;

[0014] In the figure, 1 is the housing, 2 is the main shaft, 3 is the cylinder block, 4 is the swash plate, 5 is the return plate, 6 is the floating plate, 7 is the distribution plate, 8 is the plunger, 9 is the front end cover, 10 is the rear tail cover, 11 is the front shaft seal, 12 is the rear shaft seal, 13 is the front support bearing, 14 is the rear support bearing, 15 is the ball joint, 16 is the mounting hole, 17 is the push rod, 18 is the spring, 19 is the sliding ring, 20 is the front bearing seat, 21 is the dust cover, 22 is the dust ring, 23 is the rear bearing seat, 24 is the rear seal cover. DETAILED DESCRIPTION

[0015] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0018] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0019] like Figure 1As shown, the utility model provides a high-durability swash plate plunger water pump, comprising a housing 1, a main shaft 2 arranged in the housing 1, a cylinder body 3 arranged in the housing 1 and sleeved on the main shaft 2, a swash plate 4 arranged on the left side of the cylinder body 3, a return plate 5 slidably fitted on the swash plate 4, a floating plate 6 and a distribution plate 7 are provided on the right side of the cylinder body 3, a plunger 8 is slidably installed in the cylinder body 3, and the end of the plunger 8 is installed on the return plate 5 through a sliding shoe, a front end cover 9 is provided on the left side of the housing 1, and a rear tail cover 10 is provided on the right side of the housing 1; the main shaft 2 extends from the front end cover 9, passes through the housing 1 and extends into the rear tail cover 10, and a front shaft seal 11 is provided on the left end of the main shaft 2 and a rear shaft seal 12 is provided on the right end; a front support bearing 13 is installed on the front end cover 9 at the outside of the front shaft seal 11; a rear support bearing 14 is installed on the rear tail cover 10 at the outside of the rear shaft seal 12.

[0020] The front support bearing 13 and the rear support bearing 14 are ball bearings. The high-durability swash plate plunger water pump disclosed in this application employs a ball bearing support structure at both ends of the main shaft 2. Compared to traditional sliding bearings, this support structure offers improved centering and support, ensuring the stability of the main shaft 2 during high-speed movement and reducing vibration during water pump operation.

[0021] At the same time, in addition to the reliable radial support effect of the ball bearings at both ends, the structure of the ball bearings in this application can also provide a higher axial limiting ability for the main shaft 2, which can effectively reduce the axial transmission of the main shaft 2. During the movement, the contact between the swash plate 4 and the sliding shoe, as well as the sealing state of dynamic sealing parts such as the cylinder body 3 and the distribution plate 7 are more stable and reliable, reducing the leakage in the pump.

[0022] Since the medium transported in the present application is water, in order to match the structure of the ball bearing supports at both ends of the present application, the present application adopts a structure in which a front shaft seal 11 is set at the left end of the main shaft 2 and a rear shaft seal 12 is set at the right end of the main shaft 2. The water medium in the shell 1 is confined to the internal space of the shell 1 between the front shaft seal 11 and the rear shaft seal 12, and the front support bearing 13 and the rear support bearing 14 are both set outside the influence range of the water medium. This can avoid the erosion and influence of water on the bearings, and can make the ball bearings at this location have a better operating environment, avoid rust and contamination by pollutants in the water medium, and greatly extend the service life of the bearings.

[0023] A ball joint 15 is slidably mounted on the main shaft 2, a mounting hole 16 is penetrated on the upper portion of the cylinder body 3, a push rod 17 and a spring 18 are axially arranged in the mounting hole 16, and the spring 18 drives the push rod 17 to push the ball joint 15 so that the return plate 5 is tightly attached to the swash plate 4.

[0024] A pushing structure of the ball joint 15 is provided in the mounting hole 16. Compared with the prior art method of installing the anti-rotation rod and the spring 18 separately, the push rod 17 can fully produce the function of anti-rotation and pushing the ball joint 15 during installation, and can prevent the spring 18 from receiving additional adverse tangential torsional external force during rotation, thereby improving the force environment of the spring 18, effectively preventing the spring 18 from getting stuck and other adverse events, and improving the reliability of the water pump.

[0025] At the same time, in the present application, the mounting hole 16 in the cylinder body 3 is a through-hole structure, one end of the spring 18 pushes the ball joint 15 through the push rod 17, and the other end directly pushes the floating plate 6. In this way, the left side of the floating plate 6 does not directly bear the side pressure of the cylinder body 3, but only receives the pushing pressure of the spring 18. The floating of the floating plate 6 is more flexible and free, and has a better sealing and fitting effect with the distribution plate. The leakage inside the water pump is lower, and the efficiency of the water pump is improved.

[0026] A sliding ring 19 is embedded in the center of the ball joint 15 and fits snugly around the outer circumference of the main shaft 2. This ring is made of polyetheretherketone (PEEK). This reduces the friction coefficient of the ball joint 15 during axial motion. Polyetheretherketone (PEEK), also known as PEEK, offers excellent wear resistance and self-lubrication, making it suitable for aqueous media. This structure helps to better compress the return plate 5 and improve the reliability of the water pump.

[0027] A front bearing seat 20 is provided on the front end cover 9, and the front support bearing 13 is installed in the front bearing seat 20; on the front bearing seat 20, a dust cover 21 is installed on the outside of the front support bearing 13, and the dust cover 21 is provided with a dust ring 22 that is in sealing contact with the main shaft 2.

[0028] The rear tail cover 10 is provided with a rear bearing seat 23 , and the rear support bearing 14 is installed in the rear bearing seat 23 ; a rear cover 24 is installed on the rear bearing seat 23 and located outside the rear support bearing 14 .

[0029] The separate installation of the front and rear bearing seats 20 and 23 reduces manufacturing complexity and facilitates machining precision in key areas. It also enhances the pump's assembly performance, facilitating both initial assembly and subsequent maintenance. The use of components such as the dust cover 21, dust ring 22, and rear cover 24 provides a favorable operating environment for the front and rear support bearings 13 and 14, preventing the ingress of dust and moisture that could damage the bearings. This structure improves the pump's overall reliability.

[0030] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0031] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-durability swash plate plunger water pump, comprising a housing (1), a main shaft (2) arranged in the housing (1), a cylinder (3) arranged in the housing (1) and sleeved on the main shaft (2), a swash plate (4) arranged on the left side of the cylinder (3), a return plate (5) slidably mounted on the swash plate (4), a floating plate (6) and a distribution plate (7) are arranged on the right side of the cylinder (3), a plunger (8) is slidably mounted in the cylinder (3), and the end of the plunger (8) is mounted on the return plate (5) through a sliding shoe, characterized in that: A front end cover (9) is provided on the left side of the housing (1), and a rear end cover (10) is provided on the right side of the housing (1); the main shaft (2) extends from the front end cover (9), passes through the housing (1) and extends into the rear end cover (10); a front shaft seal (11) is provided on the left end of the main shaft (2), and a rear shaft seal (12) is provided on the right end; a front support bearing (13) is installed on the front end cover (9) outside the front shaft seal (11); and a rear support bearing (14) is installed on the rear end cover (10) outside the rear shaft seal (12).

2. A high-durability swash plate plunger water pump according to claim 1, characterized in that: The front support bearing (13) and the rear support bearing (14) are ball bearings.

3. The high-durability swash plate plunger water pump according to claim 1, characterized in that: A ball joint (15) is slidably mounted on the main shaft (2), a mounting hole (16) is provided through the upper portion of the cylinder body (3), a push rod (17) and a spring (18) are axially arranged in the mounting hole (16), and the spring (18) drives the push rod (17) to push the ball joint (15) so that the return plate (5) is tightly attached to the swash plate (4).

4. A high-durability swash plate plunger water pump according to claim 3, characterized in that: A sliding ring (19) is embedded in the center of the ball joint (15), and the sliding ring (19) is sleeved and installed on the outer periphery of the main shaft (2). The material of the sliding ring (19) is polyetheretherketone.

5. The high-durability swash plate plunger water pump according to claim 1, characterized in that: A front bearing seat (20) is provided on the front end cover (9), and the front support bearing (13) is installed in the front bearing seat (20); a dust cover (21) is installed on the front bearing seat (20) at the outer side of the front support bearing (13), and a dust ring (22) is provided on the dust cover (21) for sealing contact with the main shaft (2).

6. The high-durability swash plate plunger water pump according to claim 1, characterized in that: A rear bearing seat (23) is provided on the rear tail cover (10), and the rear support bearing (14) is installed in the rear bearing seat (23); a rear cover (24) is installed on the rear bearing seat (23) at the outer side of the rear support bearing (14).

Images