Swash plate type plunger water pump

Abstract

The invention provides a swash plate type plunger water pump, and belongs to the technical field of electronic water pumps, the swash plate type plunger water pump comprises: a housing provided with a pump cavity, a motor cavity, a water inlet and a water outlet; the swash plate is fixed relative to the shell; the pump head assembly is located in the pump cavity; the motor assembly is located in the motor cavity; the rotating shaft penetrates through the swash plate, the two ends of the rotating shaft are located in the pump cavity and the motor cavity respectively, an included angle is formed between the inclined surface of the swash plate and the axis of the rotating shaft, and the distance between the swash plate and the water outlet is smaller than that between the swash plate and the water inlet. The integrated pump has the beneficial effects that the motor assembly, the pump head assembly and the rotating shaft are integrated in the shell, connecting parts such as an external coupler, a flange or a transmission shaft needed by a traditional split type design are omitted, and an integrated structure is achieved; the rotating shaft is directly connected with the motor assembly and the pump head assembly, and efficient direct-drive transmission is achieved.

Description

Technical Field

[0001] This invention belongs to the field of electronic water pump technology and relates to a swashplate plunger water pump. Background Technology

[0002] With the development of intelligent equipment, bionic robots, precision medical equipment, and high-end industrial systems, higher demands are being placed on the miniaturization, integration, and high efficiency of fluid drive components. Plunger pumps, due to their advantages such as high pressure and stable flow, have broad application prospects in the fields of hydraulic drive and liquid transportation. Among them, swashplate plunger pumps, through a swashplate mechanism, convert rotary motion into the reciprocating motion of multiple plungers, offering advantages such as high volumetric efficiency, high power density, and stable operation, making them one of the important technological pathways for achieving efficient liquid transportation.

[0003] However, most swashplate piston pumps currently on the market are of a split design, typically providing only the pump head unit, while key components such as the motor and control module must be selected and integrated by the user. In practical applications, the motor and pump head must be mechanically coupled through external connection mechanisms such as couplings, flanges, or drive shafts, which not only increases assembly complexity but also results in a lengthy, bulky, and heavy overall structure. This structure severely restricts its application in space-constrained scenarios and makes it difficult to meet the design requirements of modern intelligent systems for lightweight, compact, and modular designs.

[0004] More notably, traditional split-type structures are prone to alignment errors, vibrations, and energy losses during transmission, affecting the pump's operational stability and lifespan. Furthermore, due to the lack of integrated sealing and lubrication design, key friction pairs (such as the swashplate and sliding plate, shaft and bearings) are prone to accelerated wear due to poor lubrication. This is especially true in water-based applications, where metal components are more susceptible to corrosion and dry friction, leading to decreased reliability.

[0005] Furthermore, in high-precision technology fields such as humanoid robots, bionic joint drives, wearable devices, or micro hydraulic systems, the requirements for the integration, response speed, and quietness of the power unit are extremely stringent. Existing swashplate piston pumps, due to their dispersed structure, large size, high vibration and noise, and inability to achieve electric-pump integration, are difficult to adapt to such high-dynamic, small-space, and high-reliability application scenarios, which seriously limits their promotion and application in cutting-edge technology fields and has considerable room for improvement. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a swashplate plunger pump.

[0007] The objective of this invention can be achieved through the following technical solution: a swashplate plunger pump, comprising:

[0008] The outer casing is provided with a pump chamber, a motor chamber, a water inlet, and a water outlet, and the water inlet and the water outlet are both connected to the pump chamber;

[0009] A swashplate, fixed relative to the housing, is located between the pump chamber and the motor chamber, which are separated by the swashplate.

[0010] Pump head assembly, which is located in the pump chamber;

[0011] The motor assembly is located in the motor cavity;

[0012] A rotating shaft passes through the swashplate and has its two ends located in the pump chamber and the motor chamber, respectively. The pump head assembly is connected to the rotating shaft, and the motor assembly is connected to the rotating shaft. The inclined surface of the swashplate forms an angle with the axis of the rotating shaft. The distance between the swashplate and the outlet is less than the distance between the swashplate and the inlet.

[0013] In the aforementioned swashplate plunger pump, the pump head assembly includes a rotating disk, a sliding disk, and a piston. The rotating disk is connected to the rotating shaft, and the sliding disk is connected to the ball joint of the rotating shaft and contacts the swashplate. The rotating disk is provided with a flow channel and a movable channel. When the rotating disk rotates, different flow channels are connected to the inlet and the outlet. Each movable channel is connected to each flow channel. One end of the piston is slidably connected to the movable channel and seals the end of the movable channel away from the flow channel. A plug cavity is formed between the side of the piston near the flow channel and the movable channel. The other end of the piston is connected to the ball joint of the sliding disk. When the piston slides, the size of the plug cavity changes.

[0014] In the aforementioned swashplate plunger pump, the sliding disc is provided with a sliding block, the sliding disc contacts the swashplate through the sliding block, and the other end of the piston is connected to the ball head of the sliding block.

[0015] In the aforementioned swashplate plunger water pump, the piston is provided with a first lubrication channel, and the sliding block is provided with a second lubrication channel. One end of the first lubrication channel is connected to the plunger cavity. When the piston moves relative to the sliding block, one end of the second lubrication channel is always connected to the other end of the first lubrication channel, and the other end of the second lubrication channel is aligned with the swashplate.

[0016] In the aforementioned swashplate plunger pump, a labyrinth groove is provided at the bottom of the sliding block, and the other end of the second lubrication channel is connected to the pump chamber through the labyrinth groove.

[0017] In the aforementioned swashplate plunger pump, a water separator is also included. The water separator is disposed in the motor cavity and divides the motor cavity into a waterless cavity and a water-containing cavity. The motor assembly includes a stator and a mover. The stator is disposed in the waterless cavity and connected to the housing, and the mover is disposed in the water-containing cavity and connected to the rotating shaft.

[0018] In the aforementioned swashplate plunger pump, the swashplate is provided with a third lubrication channel, and the pump chamber is connected to the water chamber through the third lubrication channel.

[0019] In the aforementioned swashplate plunger pump, the outer casing is further provided with a distribution section, which includes a low-pressure tank and a high-pressure tank. The inlet is connected to the low-pressure tank, and the outlet is connected to the high-pressure tank. When the rotating disc rotates, different flow channels are connected to the low-pressure tank and the high-pressure tank.

[0020] In the aforementioned swashplate plunger pump, a lubrication space is formed between the outer casing and the rotating disc, and one end of the rotating shaft located in the pump chamber is located in the lubrication space. The outer casing is also provided with a fourth lubrication channel, and the lubrication space is connected to the low-pressure groove through the fourth lubrication channel.

[0021] In the aforementioned swashplate plunger water pump, the outer casing is further provided with a fifth lubrication channel and a mounting slot. There are two mounting slots, with the two ends of the rotating shaft located in the two mounting slots respectively. One mounting slot is connected to the lubrication space through the fifth lubrication channel. The rotating shaft is provided with a sixth lubrication channel, and the two mounting slots are connected through the sixth lubrication channel.

[0022] Compared with existing technologies, the advantages of this invention are as follows: The motor assembly, pump head assembly, and rotating shaft are integrated into a housing, eliminating the need for external couplings, flanges, or drive shafts required in traditional split designs. This achieves an integrated structure, simplifies the overall assembly process, reduces the number of parts and assembly errors, and lowers product size and weight. The rotating shaft directly connects the motor assembly and pump head assembly, achieving efficient direct-drive transmission and avoiding vibration, noise, and energy loss caused by misalignment, thus improving stability and transmission efficiency. A plunger mechanism employing a rotating disk, sliding disk, and piston works in tandem to achieve efficient volumetric pumping. The rotating disk rotates synchronously with the rotating shaft, periodically connecting the inlet and outlet through its flow channels to complete the flow distribution function. The sliding disk, under the action of the swashplate, oscillates axially, driving the piston to slide back and forth within the moving channel, changing the volume of the plug cavity, thereby achieving liquid intake at the inlet and discharge at the outlet. The piston's two ends are connected to the rotating disk and sliding disk respectively, resulting in a stable structure and flexible movement, reducing mechanical stress concentration. This design improves operational stability and lifespan. The introduction of a sliding block as a contact medium between the sliding disk and the swashplate significantly reduces wear caused by direct friction. Simultaneously, the piston is connected to the sliding block via a ball joint, allowing it to freely adjust its angle during oscillation, preventing jamming due to assembly errors or deformation. This ensures smooth piston reciprocating motion and improves pump reliability and durability. Water within the piston's internal chamber serves as the lubricating medium, forming a dynamically connected lubrication path through the first and second lubrication channels. This continuously supplies lubricant to the swashplate contact surface during the relative movement of the piston and sliding block. No additional lubrication system is required, achieving self-lubricating operation and reducing friction between the swashplate and sliding block, thus preventing dry-running damage. The labyrinth groove guides the lubricant to distribute evenly across the contact area between the sliding block and the swashplate, enhancing lubrication. Excess lubricant flows back to the pump chamber through the labyrinth groove, forming a closed-loop lubrication system. This prevents internal pressure buildup, maintains system pressure balance, and utilizes the negative pressure of the pump chamber to assist in the return flow, improving lubrication efficiency and cleanliness. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the swashplate plunger pump of the present invention.

[0024] Figure 2 This is a top view of the swashplate plunger pump of the present invention.

[0025] Figure 3 for Figure 2 A cross-sectional view from the perspective of AA.

[0026] Figure 4 This is an exploded view of the pump head assembly of the present invention.

[0027] Figure 5 This is an exploded view of the sliding block and piston of the present invention.

[0028] Figure 6 This is a partial structural diagram of the outer casing of the present invention.

[0029] In the diagram, 100 is the outer casing; 110 is the pump chamber; 111 is the inlet; 112 is the outlet; 120 is the motor chamber; 121 is the dry chamber; 122 is the wet chamber; 130 is the distribution section; 131 is the low-pressure tank; 132 is the high-pressure tank; 140 is the lubrication space; 150 is the fourth lubrication channel; 160 is the fifth lubrication channel; 170 is the mounting slot; 200 is the swashplate; 210 is the third lubrication channel; and 30 is the swashplate. 0. Rotating shaft; 310. Sixth lubrication channel; 400. Pump head assembly; 410. Rotating disk; 411. Flow channel; 412. Moving channel; 420. Sliding disk; 421. Sliding block; 422. Second lubrication channel; 423. Labyrinth groove; 430. Piston; 431. Plug cavity; 432. First lubrication channel; 500. Motor assembly; 510. Stator; 520. Mover; 600. Water separator. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0036] like Figures 1-6 As shown, a swashplate plunger pump includes: a housing 100, a swashplate 200, a pump head assembly 400, a motor assembly 500, and a rotating shaft 300.

[0037] The outer casing 100 is provided with a pump chamber 110, a motor chamber 120, a water inlet 111 and a water outlet 112, and the water inlet 111 and the water outlet 112 are both connected to the pump chamber 110.

[0038] The swash plate 200 is fixed relative to the outer casing 100. The swash plate 200 is located between the pump chamber 110 and the motor chamber 120, and the pump chamber 110 and the motor chamber 120 are separated by the swash plate 200.

[0039] Specifically, the swash plate 200 and the outer casing 100 are an integral structure.

[0040] The pump head assembly 400 is located in the pump chamber 110.

[0041] The motor assembly 500 is located in the motor cavity 120.

[0042] The rotating shaft 300 passes through the swashplate 200 and its two ends are located in the pump chamber 110 and the motor chamber 120, respectively. The pump head assembly 400 is connected to the rotating shaft 300, and the motor assembly 500 is connected to the rotating shaft 300. The inclined surface of the swashplate 200 forms an angle with the axis of the rotating shaft 300. The distance between the swashplate 200 and the outlet 112 is less than the distance between the swashplate 200 and the inlet 111.

[0043] In this embodiment, the motor assembly 500, pump head assembly 400, and rotating shaft 300 are integrated into the housing 100, eliminating the need for external couplings, flanges, or drive shafts required in traditional split designs. This achieves an integrated structure, simplifies the overall assembly process, reduces the number of parts and assembly errors, and lowers the product size and weight. The rotating shaft 300 directly connects the motor assembly 500 and the pump head assembly 400, enabling efficient direct drive transmission. This avoids vibration, noise, and energy loss caused by misalignment, and improves stability and transmission efficiency.

[0044] like Figures 1-6 As shown, based on the above embodiment, the pump head assembly 400 includes a rotating disk 410, a sliding disk 420, and a piston 430. The rotating disk 410 is connected to the rotating shaft 300, and the sliding disk 420 is ball-jointed to the rotating shaft 300 and contacts the inclined disk 200. The rotating disk 410 is provided with a flow channel 411 and a movable channel 412. When the rotating disk 410 rotates, different flow channels 411 are connected to the inlet 111 and the outlet 112. Each movable channel 412 is connected to each flow channel 411. One end of the piston 430 is slidably connected to the movable channel 412 and seals the end of the movable channel 412 away from the flow channel 411. A plug cavity 431 is formed between the side of the piston 430 near the flow channel 411 and the movable channel 412. The other end of the piston 430 is ball-jointed to the sliding disk 420. When the piston 430 slides, the size of the plug cavity 431 changes.

[0045] In this embodiment, a plunger mechanism is adopted in which the rotating disk 410, the sliding disk 420 and the piston 430 work together to achieve efficient volumetric pumping. The rotating disk 410 rotates synchronously with the rotating shaft 300 and periodically connects the inlet 111 and the outlet 112 through the flow channel 411 on it to complete the flow distribution function. The sliding disk 420 generates axial swing under the action of the swash plate 200, which drives the piston 430 to slide back and forth in the movable channel 412, changing the volume of the plug cavity 431, thereby realizing the liquid intake of the inlet 111 and the liquid discharge of the outlet 112. The two ends of the piston 430 are connected to the rotating disk 410 and the sliding disk 420 respectively. The structure is stable and the movement is flexible, effectively reducing mechanical stress concentration and improving the smoothness of operation and service life.

[0046] like Figures 1-6 As shown, based on the above embodiment, the sliding disk 420 is provided with a sliding block 421, the sliding disk 420 contacts the swashplate 200 through the sliding block 421, and the other end of the piston 430 is connected to the ball head of the sliding block 421.

[0047] Specifically, the sliding block 421 can be made of a highly wear-resistant material, such as engineering plastics or self-lubricating composite materials, for easy replacement and maintenance.

[0048] In this embodiment, a sliding block 421 is introduced as a contact medium between the sliding disk 420 and the swashplate 200, which can significantly reduce the wear caused by direct friction between the two. At the same time, the piston 430 is connected to the sliding block 421 through a ball head, allowing it to freely adjust its angle during the swing process, avoiding jamming caused by assembly errors or deformation, ensuring smooth reciprocating motion of the piston 430, and improving the reliability and durability of the pump body.

[0049] like Figures 1-6 As shown, based on the above embodiment, the piston 430 is provided with a first lubrication channel 432, and the sliding block 421 is provided with a second lubrication channel 422. One end of the first lubrication channel 432 is connected to the plug cavity 431. When the piston 430 moves relative to the sliding block 421, one end of the second lubrication channel 422 is always connected to the other end of the first lubrication channel 432, and the other end of the second lubrication channel 422 is aligned with the swashplate 200.

[0050] In this embodiment, water in the plug cavity 431 inside the piston 430 is used as the lubricating medium. A dynamically connected lubrication path is formed through the first lubrication channel 432 and the second lubrication channel 422. During the relative movement of the piston 430 and the sliding block 421, liquid is continuously supplied to the contact surface of the swashplate 200 for lubrication. No additional lubrication system is required, achieving self-lubricating operation, reducing the friction between the swashplate 200 and the sliding block 421, thereby preventing dry friction damage.

[0051] like Figures 1-6 As shown, based on the above embodiment, the bottom of the sliding block 421 is provided with a labyrinth groove 423, and the other end of the second lubrication channel 422 is connected to the pump chamber 110 through the labyrinth groove 423.

[0052] In this embodiment, the labyrinth groove 423 can guide the lubricant to be evenly distributed in the contact area between the sliding block 421 and the swash plate 200, thereby enhancing the lubrication effect. At the same time, excess lubricant flows back to the pump chamber 110 through the labyrinth groove 423, forming a closed-loop lubrication system, which avoids internal pressure accumulation, maintains system pressure balance, and uses the negative pressure of the pump chamber 110 to assist the return flow, thereby improving lubrication efficiency and cleanliness.

[0053] like Figures 1-6As shown, based on the above embodiment, a water-blocking component 600 is also included. The water-blocking component 600 is disposed in the motor cavity 120 and divides the motor cavity 120 into a waterless cavity 121 and a water-containing cavity 122. The motor assembly 500 includes a stator 510 and a mover 520. The stator 510 is disposed in the waterless cavity 121 and connected to the outer casing 100. The mover 520 is disposed in the water-containing cavity 122 and connected to the rotating shaft 300.

[0054] In this embodiment, the water-proof component 600 isolates the motor cavity 120 into a waterless cavity 121 and a water-filled cavity 122, making the motor stator 510 completely waterproof and preventing moisture intrusion that could lead to insulation failure or short circuit. The mover 520 is placed in the water-filled cavity 122 and can be directly cooled and lubricated by the pumping medium, improving heat dissipation efficiency. This structure eliminates the need for traditional mechanical seal devices, reducing leakage risks and maintenance costs, and is suitable for long-term immersion in water or operation in high-humidity environments.

[0055] like Figures 1-6 As shown, based on the above embodiment, the swash plate 200 is provided with a third lubrication channel 210, and the pump chamber 110 is connected to the water chamber 122 through the third lubrication channel 210.

[0056] In this embodiment, the third lubrication channel 210 introduces the medium in the pump chamber 110 into the water chamber 122, providing continuous lubrication and cooling for the bearing position of the rotating shaft 300 in the water chamber 122 or the connection area between the mover 520 and the rotating shaft 300, so as to prevent dry friction damage caused by lack of liquid and make full use of the pumped medium to achieve internal lubrication self-sufficiency.

[0057] like Figures 1-6 As shown, based on the above embodiment, the outer shell 100 is further provided with a flow distribution section 130. The flow distribution section 130 includes a low-pressure tank 131 and a high-pressure tank 132. The inlet 111 is connected to the low-pressure tank 131, and the outlet 112 is connected to the high-pressure tank 132. When the rotating disk 410 rotates, different flow channels 411 are connected to the low-pressure tank 131 and the high-pressure tank 132.

[0058] In this embodiment, the distribution section 130 is connected to the inlet 111 and the outlet 112 through the low-pressure tank 131 and the high-pressure tank 132 respectively, and works with the flow channel 411 on the rotating disk 410 to achieve precise suction and discharge switching. This method of forming the distribution section 130 in the form of a tank on the outer shell 100 is easy to process and maintain, can effectively prevent high-pressure water from flowing back to the low-pressure area, improve volumetric efficiency, and avoid the sealing problems caused by traditional additional distribution disk parts.

[0059] like Figures 1-6As shown, based on the above embodiment, a lubrication space 140 is formed between the outer shell 100 and the rotating disk 410. One end of the rotating shaft 300 located in the pump chamber 110 is located in the lubrication space 140. The outer shell 100 is also provided with a fourth lubrication channel 150. The lubrication space 140 is connected to the low-pressure groove 131 through the fourth lubrication channel 150.

[0060] In this embodiment, the lubrication space 140 is located between the rotating disk 410 and the housing 100, providing a lubrication environment for the end of the rotating shaft 300 and the support part of the rotating disk 410. Low-pressure water is introduced from the low-pressure tank 131 through the fourth lubrication channel 150 to continuously lubricate this area, preventing dry friction damage caused by high-speed rotation. Using the low-pressure zone for liquid supply can also avoid high-pressure impact, maintain lubrication stability, extend the life of the seals and bearings between the rotating disk 410 and the housing 100, and improve the smoothness of pump operation.

[0061] like Figures 1-6 As shown, based on the above embodiment, the outer casing 100 is further provided with a fifth lubrication channel 160 and a mounting groove 170. There are two mounting grooves 170. The two ends of the rotating shaft 300 are respectively located in the two mounting grooves 170. One mounting groove 170 is connected to the lubrication space 140 through the fifth lubrication channel 160. The rotating shaft 300 is provided with a sixth lubrication channel 310. The two mounting grooves 170 are connected through the sixth lubrication channel 310.

[0062] In this embodiment, the fifth lubrication channel 160 introduces the lubricant from the lubrication space 140 into one end mounting groove 170, and then through the sixth lubrication channel 310 inside the rotating shaft 300 to the other end mounting groove 170, thereby achieving bidirectional balanced lubrication. This ensures that both support points of the rotating shaft 300 are adequately lubricated, avoiding uneven wear or premature failure due to uneven lubrication, and improving bearing life.

Claims

1. A swashplate plunger pump, characterized in that, include: The outer casing is provided with a pump chamber, a motor chamber, a water inlet, and a water outlet, and the water inlet and the water outlet are both connected to the pump chamber; A swashplate, fixed relative to the housing, is located between the pump chamber and the motor chamber, which are separated by the swashplate. Pump head assembly, which is located in the pump chamber; The motor assembly is located in the motor cavity; A rotating shaft passes through the swashplate and has its two ends located in the pump chamber and the motor chamber, respectively. The pump head assembly is connected to the rotating shaft, and the motor assembly is connected to the rotating shaft. The inclined surface of the swashplate forms an angle with the axis of the rotating shaft. The distance between the swashplate and the outlet is less than the distance between the swashplate and the inlet.

2. The swashplate plunger pump as described in claim 1, characterized in that: The pump head assembly includes a rotating disk, a sliding disk, and a piston. The rotating disk is connected to the rotating shaft, and the sliding disk is connected to the ball joint of the rotating shaft and contacts the inclined disk. The rotating disk is provided with a flow channel and a movable channel. When the rotating disk rotates, different flow channels are connected to the inlet and the outlet. Each movable channel is connected to each flow channel. One end of the piston is slidably connected to the movable channel and seals the end of the movable channel away from the flow channel. A plug cavity is formed between the side of the piston near the flow channel and the movable channel. The other end of the piston is connected to the ball joint of the sliding disk. When the piston slides, the size of the plug cavity changes.

3. A swashplate plunger pump as described in claim 2, characterized in that: The sliding disk is provided with a sliding block, and the sliding disk contacts the swashplate through the sliding block. The other end of the piston is connected to the ball head of the sliding block.

4. A swashplate plunger pump as described in claim 3, characterized in that: The piston is provided with a first lubrication channel, and the sliding block is provided with a second lubrication channel. One end of the first lubrication channel is connected to the plug cavity. When the piston moves relative to the sliding block, one end of the second lubrication channel is always connected to the other end of the first lubrication channel, and the other end of the second lubrication channel is aligned with the swashplate.

5. A swashplate plunger pump as described in claim 4, characterized in that: The bottom of the sliding block is provided with a labyrinth groove, and the other end of the second lubrication channel is connected to the pump chamber through the labyrinth groove.

6. A swashplate plunger pump as described in claim 5, characterized in that: It also includes a water-proof component, which is disposed in the motor cavity and divides the motor cavity into a waterless cavity and a water-filled cavity. The motor assembly includes a stator and a mover. The stator is disposed in the waterless cavity and connected to the housing, and the mover is disposed in the water-filled cavity and connected to the rotating shaft.

7. A swashplate plunger pump as described in claim 6, characterized in that: The swash plate is provided with a third lubrication channel, and the pump chamber is connected to the water chamber through the third lubrication channel.

8. A swashplate plunger pump as described in claim 2, characterized in that: The outer casing is also provided with a flow distribution section, which includes a low-pressure tank and a high-pressure tank. The water inlet is connected to the low-pressure tank, and the water outlet is connected to the high-pressure tank. When the rotating disk rotates, different flow channels are connected to the low-pressure tank and the high-pressure tank.

9. A swashplate plunger pump as described in claim 8, characterized in that: A lubrication space is formed between the outer casing and the rotating disk. One end of the rotating shaft located in the pump chamber is located in the lubrication space. The outer casing is also provided with a fourth lubrication channel. The lubrication space is connected to the low-pressure groove through the fourth lubrication channel.

10. A swashplate plunger pump as described in claim 9, characterized in that: The outer casing is also provided with a fifth lubrication channel and a mounting slot. There are two mounting slots. The two ends of the rotating shaft are respectively located in the two mounting slots. One mounting slot is connected to the lubrication space through the fifth lubrication channel. The rotating shaft is provided with a sixth lubrication channel. The two mounting slots are connected through the sixth lubrication channel.

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