Multi-point-position supported water pump

Abstract

The utility model provides a multi-point supporting water pump which comprises a shell, a main shaft installed in the shell and a cylinder body arranged in the shell, and the main shaft is inserted into the cylinder body from the left end of the shell; a front end cover is arranged at the left end of the shell, and a rear cover is arranged at the right end of the shell; a swash plate is installed on the inner side of the front end cover, the left end of the main shaft is sleeved with a first sliding bearing, and the first sliding bearing is embedded in the swash plate; a second sliding bearing is arranged on the inner wall of the shell and arranged on the periphery of the cylinder body in a sleeving mode, effective supporting is achieved by arranging the sliding bearings at important supporting positions of rotating components such as a water pump main shaft and the cylinder body, sealing of an inner cavity is completed through a shaft seal, and the sliding bearings are cooled by introducing medium fluid. The structure improves the support of moving parts in the water pump, the water pump moves more stably, and the reliability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of fluids, in particular to a water pump with multi-point support. 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. Among the many faults, insufficient support of the cylinder body and the main shaft causes the water pump to be unable to use high speed or vibrates greatly when working at high speed, resulting in abnormal wear of internal components or large internal leakage. These problems are more prominent. Utility Model Content

[0004] The technical problem to be solved by the present utility model is that the existing water pump structure has insufficient support for rotating parts such as the main shaft and cylinder body, which leads to abnormal vibration of the water pump during high-speed operation and low reliability. The present utility model provides a water pump with multi-point support to solve the above problem.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a multi-point supported water pump, comprising a housing, a main shaft installed in the housing and a cylinder body arranged in the housing, the main shaft being inserted into the cylinder body from the left end of the housing; a front end cover is provided at the left end of the housing, and a rear cover is provided at the right end; a swash plate is installed on the inner side of the front end cover, the left end of the main shaft is sleeved with a first sliding bearing, and the first sliding bearing is embedded in the swash plate; a second sliding bearing is provided on the inner wall of the housing, and the second sliding bearing is sleeved on the outer periphery of the cylinder body.

[0006] Furthermore: a return plate is slidably mounted on the swash plate, a ball joint is slidably mounted on the main shaft, a mounting hole is provided on 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.

[0007] Furthermore: a left shaft seal is provided at the left end of the main shaft, located outside the first sliding bearing, and the left shaft seal is in sealing contact with the front end cover; a right shaft seal is provided at the right end of the main shaft, and the right shaft seal is in sealing contact with the rear cover.

[0008] Furthermore: the number of the second sliding bearings is two, and the two second sliding bearings are axially separated and arranged on the outer periphery of the cylinder body; a lubrication cavity is provided on the outer wall of the cylinder body between the two second sliding bearings, and a guide channel is axially penetrated on the cylinder body, and the guide channel is connected to the lubrication cavity.

[0009] 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.

[0010] The beneficial effect of the present invention is that the present invention effectively supports the main shaft and cylinder body of the water pump by arranging sliding bearings at important supporting positions of the rotating parts, and completes the sealing of the inner cavity by the shaft seal. By using the medium fluid to cool the sliding bearings, this structure improves the support of the moving parts in the water pump, the water pump moves more smoothly, and the reliability is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] In the figure, 1 is the housing, 2 is the main shaft, 3 is the cylinder block, 4 is the front cover, 5 is the rear cover, 6 is the swash plate, 7 is the first sliding bearing, 8 is the second sliding bearing, 9 is the return plate, 10 is the ball joint, 11 is the mounting hole, 12 is the push rod, 13 is the spring, 14 is the left shaft seal, 15 is the right shaft seal, 16 is the lubrication chamber, 17 is the guide channel, and 18 is the sliding ring. DETAILED DESCRIPTION

[0014] 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.

[0015] 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, rather than indicating or implying 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 limiting the present invention.

[0016] 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.

[0017] 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.

[0018] like Figure 1 As shown, the utility model provides a multi-point supported water pump, comprising a housing 1, a main shaft 2 installed in the housing 1 and a cylinder body 3 arranged in the housing 1, the main shaft 2 is inserted into the cylinder body 3 from the left end of the housing 1; a front end cover 4 is provided at the left end of the housing 1, and a rear cover 5 is provided at the right end; a swash plate 6 is installed on the inner side of the front end cover 4, and the left end of the main shaft 2 is sleeved with a first sliding bearing 7, which is embedded in the swash plate 6; a second sliding bearing 8 is provided on the inner wall of the housing 1, and the second sliding bearing 8 is sleeved on the outer periphery of the cylinder body 3.

[0019] In order to improve the stability of the water pump operation in the existing technology and reduce the vibration of the water pump, this patent designs a multi-point support method for the main shaft 2 and the cylinder body 3. The first sliding bearing 7 is used to support the main shaft 2, and the second sliding bearing 8 is used to support the cylinder body 3. During normal operation of the water pump, the main shaft 2 drives the cylinder body 3 to rotate at high speed. Multi-point support of the main shaft 2 and the cylinder body 3 can effectively improve the stability of the water pump operation. Compared with the water pump in the existing technology, the cylinder body 3 is directly mounted on the main shaft 2, and the main shaft 2 plays the main supporting role. Such a structure can effectively curb the vibration during the rotation of the cylinder body 3, thereby improving the reliability of the water pump.

[0020] A return plate 9 is slidably mounted on the swash plate 6, a ball joint 10 is slidably mounted on the main shaft 2, a mounting hole 11 is provided on the cylinder body 3, a push rod 12 and a spring 13 are axially arranged in the mounting hole 11, and the spring 13 drives the push rod 12 to push the ball joint 10 so that the return plate 9 is tightly mounted on the swash plate 6.

[0021] Compared with the prior art water pump structure in which the push rod 12 or the anti-rotation rod is separately arranged from the spring 13, the spring 13 of such a structure may be subjected to a tangential force in the rotation direction during operation. This external force is an unfavorable external force and may cause abnormal deformation of the spring 13 such as twisting or bending. In this solution, the push rod 12 and the spring 13 are axially linked and installed in a mounting hole 11. At this time, the torsional tangential external force that may be generated by the rotation of the cylinder body 3 is borne by the push rod 12, and the spring 13 is only subjected to compression pressure. Therefore, the force working condition of the spring 13 is improved, the thrust of the ball joint 10 is stable, and the reliability of the water pump is improved.

[0022] A left shaft seal 14 is provided at the left end of the main shaft 2, located outside the first sliding bearing 7, and the left shaft seal 14 is in sealing contact with the front end cover 4; a right shaft seal 15 is provided at the right end of the main shaft 2, and the right shaft seal 15 is in sealing contact with the rear cover 5.

[0023] The use of left and right shaft seals 14 and 15 ensures a closed environment within housing 1, preventing leakage of the medium. Furthermore, the right shaft seal 15 prevents the water medium from flowing into the right end face of main shaft 2, thereby preventing the water medium from exerting a leftward thrust on the right end face of main shaft 2 and causing active oscillation. This results in a more balanced force on the left and right sides of main shaft 2, and a stable movement of the water pump.

[0024] There are two second sliding bearings 8, and the two second sliding bearings 8 are axially separated and arranged on the outer periphery of the cylinder body 3; a lubrication cavity 16 is provided on the outer wall of the cylinder body 3 between the two second sliding bearings 8, and a guide channel 17 is axially penetrated on the cylinder body 3, and the guide channel 17 is connected to the lubrication cavity 16.

[0025] The flow guide channel 17 balances the pressure on the left and right sides of the cylinder 3, preventing axial vibration. Furthermore, the water medium flows into the lubrication chamber 16, lubricating and cooling the second sliding bearing 8, thereby extending the life of the water pump and improving operational reliability.

[0026] A sliding ring 18 is embedded in the center of the ball joint 10 and fits snugly around the outer circumference of the main shaft 2. Made of polyetheretherketone (PEEK), this ring reduces the friction coefficient of the ball joint 10 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 9 and improve the reliability of the water pump.

[0027] 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.

[0028] 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 multi-point supported water pump, comprising a housing (1), a main shaft (2) mounted in the housing (1), and a cylinder (3) disposed in the housing (1), wherein the main shaft (2) is inserted into the cylinder (3) from the left end of the housing (1); a front end cover (4) is disposed at the left end of the housing (1), and a rear cover (5) is disposed at the right end; a swash plate (6) is mounted on the inner side of the front end cover (4), and is characterized in that: The left end of the main shaft (2) is provided with a first sliding bearing (7), which is embedded in the swash plate (6); the inner wall of the housing (1) is provided with a second sliding bearing (8), which is sleeved on the outer periphery of the cylinder body (3).

2. The multi-point supported water pump according to claim 1, characterized in that: A return plate (9) is slidably mounted on the swash plate (6), a ball joint (10) is slidably mounted on the main shaft (2), a mounting hole (11) is provided on the cylinder body (3), a push rod (12) and a spring (13) are axially arranged in the mounting hole (11), and the spring (13) drives the push rod (12) to push the ball joint (10) so that the return plate (9) is tightly mounted on the swash plate (6).

3. The multi-point supported water pump according to claim 1, characterized in that: A left shaft seal (14) is provided at the left end of the main shaft (2) on the outside of the first sliding bearing (7), and the left shaft seal (14) is in sealing contact with the front end cover (4); a right shaft seal (15) is provided at the right end of the main shaft (2), and the right shaft seal (15) is in sealing contact with the rear cover (5).

4. The multi-point supported water pump according to claim 1, characterized in that: The number of the second sliding bearings (8) is two, and the two second sliding bearings (8) are axially separated and arranged on the outer periphery of the cylinder body (3); a lubrication cavity (16) is provided on the outer wall of the cylinder body (3) at the two second sliding bearings (8), and a guide channel (17) is axially penetrated on the cylinder body (3), and the guide channel (17) is communicated with the lubrication cavity (16).

5. The multi-point supported water pump according to claim 2, characterized in that: A sliding ring (18) is embedded in the center of the ball joint (10), and the sliding ring (18) is sleeved and installed on the outer periphery of the main shaft (2). The material of the sliding ring (18) is polyetheretherketone.

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