Direct-drive servo pump device

Abstract

The utility model discloses a direct-drive servo pump device which comprises a stator shell, a motor stator is fixedly connected into the stator shell, stator end covers are fixedly connected to the two ends of the stator shell, fixing cylinders are fixedly connected to one ends of the two stator end covers, a water seal head is fixedly connected to one end of each fixing cylinder, and a water pump is fixedly connected to the other end of each fixing cylinder. One side of each water seal head is fixedly connected with a high-pressure water chamber shell, one end of each high-pressure water chamber shell is fixedly connected with a water guide head, and a high-pressure water flow output device is arranged in each water guide head. The servo motor composed of the motor stator, the nut positioning seat and the nut drives the lead screw to repeatedly and rapidly move, the lead screw repeatedly and rapidly moves to drive the piston rod to repeatedly move, then continuous high-pressure water is generated, the control precision is high, and the output pressure of the generated high-pressure water is stable.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure water generator technology, and in particular to a direct-drive servo pump device. Background Technology

[0002] Currently, in the field of high-pressure water generation, using an oil-driven water booster to generate high-pressure water is a common method. Based on the difference in piston area between the oil cylinders, the large piston drives the high-pressure water and the small piston generates high pressure. In other words, low-pressure hydraulic oil drives the oil cylinder piston to drive the small piston rod of the booster water chamber, which reciprocates to generate high-pressure water.

[0003] In the aforementioned hydraulic system, factors such as oil temperature, oil leakage, and valve reversing lag can significantly affect the stable pressure of high-pressure water. In order to ensure a stable output pressure of the generated high-pressure water, a direct-drive servo pump device is proposed. Utility Model Content

[0004] This invention provides a direct-drive servo pump device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A direct-drive servo pump device includes a stator housing, a motor stator fixedly connected inside the stator housing, stator end caps fixedly connected to both ends of the stator housing, a fixed cylinder fixedly connected to one end of each of the two stator end caps, a water seal head fixedly connected to one end of each fixed cylinder, a high-pressure water chamber shell fixedly connected to one side of each water seal head, a water guide head fixedly connected to one end of each high-pressure water chamber shell, and a high-pressure water flow output device provided inside each water guide head;

[0007] Rotor supports are rotatably connected to both stator end covers. A nut positioning seat is fixedly connected between the two rotor supports. A nut is fixedly connected inside the nut positioning seat. The nut positioning seat is rotatably connected to the motor stator. A lead screw is threaded to the center of the nut. Connecting rods are fixedly connected to both ends of the lead screw. The connecting rods pass through the rotor supports and extend into the fixed cylinder. A limiting plate is fixedly connected to one end of each connecting rod. The limiting plate is slidably connected to the fixed cylinder. Two limiting rods pass through each limiting plate. Each limiting rod is fixedly connected to the inner side wall of the fixed cylinder. A piston rod is fixedly connected to one side of the limiting plate. The piston rod passes through the water seal head and extends into the high-pressure water chamber shell.

[0008] Preferably, the high-pressure water output device includes a high-pressure water outlet and a low-pressure water inlet, which are located on the outer wall of the guide head. The guide head has an outlet channel and an inlet channel. One end of the outlet channel is connected to the high-pressure water outlet, and the other end is connected to the internal through hole of the low-pressure water inlet. One end of the inlet channel is connected to the low-pressure water inlet, and the other end is connected to the outlet channel. A first check valve is provided on the outlet channel, and a second check valve is provided on the inlet channel.

[0009] Preferably, the outer wall of the stator housing is provided with a cooling water inlet and a cooling water outlet, and the inner wall of the stator housing is provided with a cold water channel, the two ends of which are respectively connected to the cooling water inlet and the cooling water outlet.

[0010] Preferably, the diameter of the through hole inside the high-pressure water chamber is the same as the diameter of the piston rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention uses a servo motor composed of a motor stator, a lead screw positioning seat, and a lead screw to drive the lead screw to move repeatedly and rapidly. The repeated rapid movement of the lead screw drives the piston rod to move repeatedly, thereby generating continuous high-pressure water. It has high control precision and the high-pressure water output pressure is stable.

[0013] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of a direct-drive servo pump device proposed in this utility model;

[0016] Figure 2 This is a schematic diagram showing the connection between the interior of the stator shell and the interior of the fixed cylinder proposed in this utility model;

[0017] Figure 3 This is a front view cross-sectional structural diagram of a direct-drive servo pump device proposed in this utility model;

[0018] Figure 4This is a front view cross-sectional structural diagram of the stator shell proposed in this utility model;

[0019] Figure 5 for Figure 3 A magnified schematic diagram of the structure of part A in the diagram;

[0020] Figure 6 This is a schematic diagram of the rotor support structure proposed in this utility model;

[0021] Figure 7 This is a schematic diagram of the wire mother structure proposed in this utility model;

[0022] Figure 8 This is a schematic diagram of the application of the direct-drive servo pump device and system proposed in this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. High-pressure water outlet; 2. Low-pressure water inlet; 3. High-pressure water chamber shell; 4. Fixed cylinder; 5. Stator end cover; 6. Cooling water inlet; 7. Cooling water outlet; 8. Water guide head; 9. Stator shell; 10. Water seal head; 11. Motor stator; 12. Limiting plate; 13. Rotor support; 14. Nut positioning seat; 15. Nut; 16. Lead screw; 17. Water outlet channel; 18. First check valve; 19. Second check valve; 20. Water inlet channel; 21. Connecting rod; 22. Piston rod; 23. Limiting rod; 24. Direct drive servo pump device; 25. Pressure sensor; 26. High-pressure water accumulator; 27. High-pressure water switch. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described in more detail below by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0026] Example 1

[0027] Please see Figures 1-7 In this embodiment of the utility model, a direct-drive servo pump device includes a stator housing 9, a motor stator 11 is fixedly connected inside the stator housing 9, stator end caps 5 are fixedly connected to both ends of the stator housing 9, a fixed cylinder 4 is fixedly connected to one end of each of the two stator end caps 5, a water seal head 10 is fixedly connected to one end of each fixed cylinder 4, a high-pressure water chamber shell 3 is fixedly connected to one side of each water seal head 10, a water guide head 8 is fixedly connected to one end of each high-pressure water chamber shell 3, and a high-pressure water flow output device is provided inside each water guide head 8.

[0028] Rotor supports 13 are rotatably connected to both stator end covers 5. A nut positioning seat 14 is fixedly connected between the two rotor supports 13. A nut 15 is fixedly connected inside the nut positioning seat 14. The nut positioning seat 14 is rotatably connected to the motor stator 11. A lead screw 16 is threaded to the center of the nut 15. Connecting rods 21 are fixedly connected to both ends of the lead screw 16. The connecting rods 21 pass through the rotor supports 13 and extend into the fixed cylinder 4. A limiting plate 12 is fixedly connected to one end of each connecting rod 21. The limiting plate 12 is slidably connected to the fixed cylinder 4. Two limiting rods 23 pass through each limiting plate 12. Each limiting rod 23 is fixedly connected to the inner side wall of the fixed cylinder 4. A piston rod 22 is fixedly connected to one side of the limiting plate 12. The piston rod 22 passes through the water seal head 10 and extends into the high-pressure water chamber shell 3. The diameter of the through hole in the high-pressure water chamber shell 3 is the same as the diameter of the piston rod 22.

[0029] Specifically, the high-pressure water output device includes a high-pressure water outlet 1 and a low-pressure water inlet 2. The high-pressure water outlet 1 and the low-pressure water inlet 2 are located on the outer wall of the guide head 8. The guide head 8 has an outlet channel 17 and an inlet channel 20. One end of the outlet channel 17 is connected to the high-pressure water outlet 1, and the other end of the outlet channel 17 is connected to the internal through hole of the low-pressure water inlet 2. One end of the inlet channel 20 is connected to the low-pressure water inlet 2, and the other end of the inlet channel 20 is connected to the outlet channel 17. The outlet channel 17 is equipped with a first check valve 18, and the inlet channel 20 is equipped with a second check valve 19. The second check valve 19 only allows water to flow from the low-pressure water inlet 2 to the high-pressure water chamber shell 3, and the first check valve 18 only allows water to flow from the high-pressure water chamber shell 3 to the high-pressure water outlet 1.

[0030] Specifically, the outer wall of the stator housing 9 is provided with a cooling water inlet 6 and a cooling water outlet 7. The inner wall of the stator housing 9 is provided with a cold water channel (not shown). The two ends of the cold water channel are connected to the cooling water inlet 6 and the cooling water outlet 7 respectively. In order to ensure that the motor stator 11 can work continuously for a long time, the cold water can continuously flow through the cold water channel to cool the motor stator 11.

[0031] The working principle of this utility model is as follows:

[0032] The nut positioning seat 14 is the motor rotor. When AC current is applied to the winding of the motor stator 11, a rotating magnetic field is generated. The rotating magnetic field can drive the nut positioning seat 14 to rotate in both directions. The rotation of the nut positioning seat 14 in both directions can drive the nut 15 to rotate. The rotation of the nut 15 in both directions can drive the lead screw 16 to move left and right. The left and right movement of the lead screw 16 can drive the piston rod 22 to move left and right inside the high-pressure water chamber shell 3 through the connecting rod 21. Then, low-pressure water can be input through the low-pressure water inlet 2. After the low-pressure water is input into the high-pressure water chamber shell 3 through the water inlet channel 20, the piston rod 22 moves left and right repeatedly inside the high-pressure water chamber shell 3, which can squeeze the water flow and spray it out from the high-pressure water outlet 1 through the water outlet channel 17, thus generating continuous high-pressure water.

[0033] Example 2

[0034] Please see Figure 7 Specifically, two high-pressure water outlets 1 are connected to a high-pressure water accumulator 26 via pipes. A pressure sensor 25 is installed in the output end of the high-pressure water accumulator 26. The output end of the high-pressure water accumulator 26 is connected to a nozzle via a pipe. A high-pressure water switch 27 is installed on the nozzle. The nozzle can be used in combination with various types of waterjet cutting machines. The pressure sensor 25 can detect the pressure of the high-pressure water. By controlling the current intensity of the input motor stator 11, the rotation speed of the wire nut positioning seat 14 can be controlled to set different output pressures of the high-pressure water to meet the needs of various working conditions.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A direct-drive servo pump device, comprising a stator housing (9), characterized in that, The stator housing (9) is fixedly connected to the inside of the motor stator (11). Both ends of the stator housing (9) are fixedly connected to the stator end caps (5). One end of each stator end cap (5) is fixedly connected to a fixed cylinder (4). One end of each fixed cylinder (4) is fixedly connected to a water seal head (10). One side of each water seal head (10) is fixedly connected to a high-pressure water chamber shell (3). One end of each high-pressure water chamber shell (3) is fixedly connected to a water guide head (8). Each water guide head (8) is provided with a high-pressure water flow output device. Rotor supports (13) are rotatably connected inside both stator end covers (5). A nut positioning seat (14) is fixedly connected between the two rotor supports (13). A nut (15) is fixedly connected inside the nut positioning seat (14). The nut positioning seat (14) is rotatably connected inside the motor stator (11). A lead screw (16) is threadedly connected to the center of the nut (15). Connecting rods (21) are fixedly connected to both ends of the lead screw (16). The connecting rods (21) pass through the rotor supports (13) and... Extending into the fixed cylinder (4), one end of each connecting rod (21) is fixedly connected to a limiting plate (12), the limiting plate (12) is slidably connected in the fixed cylinder (4), two limiting rods (23) pass through each limiting plate (12), each limiting rod (23) is fixedly connected to the inner side wall of the fixed cylinder (4), a piston rod (22) is fixedly connected to one side of the limiting plate (12), the piston rod (22) passes through the water seal head (10) and extends into the high-pressure water chamber shell (3).

2. The direct-drive servo pump device according to claim 1, characterized in that, The high-pressure water output device includes a high-pressure water outlet (1) and a low-pressure water inlet (2). The high-pressure water outlet (1) and the low-pressure water inlet (2) are located on the outer wall of the guide head (8). The guide head (8) has an outlet channel (17) and an inlet channel (20). One end of the outlet channel (17) is connected to the high-pressure water outlet (1), and the other end of the outlet channel (17) is connected to the internal through hole of the low-pressure water inlet (2). One end of the inlet channel (20) is connected to the low-pressure water inlet (2), and the other end of the inlet channel (20) is connected to the outlet channel (17). The outlet channel (17) is provided with a first check valve (18), and the inlet channel (20) is provided with a second check valve (19).

3. The direct-drive servo pump device according to claim 2, characterized in that, The stator housing (9) has a cooling water inlet (6) and a cooling water outlet (7) on its outer side wall. The stator housing (9) has a cold water channel inside its side wall, and the two ends of the cold water channel are connected to the cooling water inlet (6) and the cooling water outlet (7) respectively.

4. The direct-drive servo pump device according to claim 3, characterized in that, The diameter of the through hole inside the high-pressure water chamber shell (3) is the same as the diameter of the piston rod (22).

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