A dynamo electric machine plunger pump

Abstract

The application discloses a series excited motor plunger pump, which comprises a pump body and a base connected with the pump body, a series excited motor is installed on the pump body, the pump body is provided with an installation part, a connecting part and a driving part from top to bottom, the size of the connecting part is smaller than that of the installation part and the driving part; a driving assembly matched with the series excited motor is installed in the pump body, and the driving assembly sequentially passes through the installation part, the connecting part and the driving part; a slidable plunger assembly is arranged in the pump body, a plunger hole is arranged on the base, and the driving assembly is used for driving the plunger assembly to be close to or away from the plunger hole. The application has the beneficial effects that the pump body is divided into the installation part, the connecting part and the driving part, the overall size of the pump body can be designed according to the size of the driving assembly, the overall profile of the pump body can be more matched with the driving assembly, the overall occupied space of the plunger pump can be reduced, and the cost can be saved; and the utility model has the advantages of small size, stable operation and long service life.

Description

Technical Field

[0001] This application relates to the field of plunger pump technology, and more particularly to a series-wound motor plunger pump. Background Technology

[0002] A plunger pump is a common device for pressurizing water, currently mainly used in high-pressure cleaning. Internally, a plunger pump typically contains a plunger rod. The reciprocating motion of the plunger rod within the plunger bore continuously changes the volume of the bore, thus circulating and pressurizing the water. The pressurized water is then discharged through the outlet to rinse dirt from object surfaces. The pump body usually houses a drive assembly. Due to the varying dimensions of the drive assembly components, the space utilization within the pump body is relatively low, resulting in a larger overall pump size.

[0003] Series-wound motors have advantages such as low cost, small size, and light weight. When applied to plunger pumps, they can ensure the stable operation of the plunger pumps. The drive assembly generally includes a rotating shaft. Due to the long length of the rotating shaft, it may wobble under high-speed rotation. Therefore, it is necessary to improve the overall structure of the plunger pump in the existing technology. Utility Model Content

[0004] One objective of this application is to provide a series-wound piston pump that can solve at least one of the defects in the aforementioned background technology.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a series-wound motor plunger pump, comprising a pump body and a base connected to the pump body, wherein a series-wound motor is mounted on the pump body, and the pump body is provided with a mounting part, a connecting part and a driving part from top to bottom, wherein the size of the connecting part is smaller than that of the mounting part and the driving part; a driving assembly cooperating with the series-wound motor is installed in the pump body, and the driving assembly passes through the mounting part, the connecting part and the driving part in sequence; a slidable plunger assembly is provided in the pump body, and a plunger hole is provided on the base, wherein the driving assembly is used to drive the plunger assembly to move closer to or away from the plunger hole.

[0006] With the above settings, the overall size of the pump body can be designed according to the size of the drive component, ensuring that the overall contour of the pump body fits the drive component better. This not only reduces the overall space occupied by the plunger pump, but also saves costs. When the plunger pump starts, the series-wound motor can drive the drive component to control the plunger assembly to reciprocate within the plunger hole, thereby pressurizing the water within the plunger hole.

[0007] Preferably, the drive assembly includes a mounting plate, a rotating shaft, and a drive plate. The mounting plate is rotatably mounted on the mounting portion, and the drive plate is tilted and mounted on the drive portion. Both the drive plate and the mounting plate are fixedly connected to the rotating shaft. This configuration allows the mounting plate and drive plate to be integrally connected via the rotating shaft. When the mounting plate rotates, the drive plate can rotate synchronously. Furthermore, the tilted drive plate allows the position of its lowest point to be changed by rotation, thereby moving the plunger assembly.

[0008] Preferably, a drive bearing is mounted on the drive disc, the drive bearing including a first sliding surface and a second sliding surface, with a plurality of balls installed between the first sliding surface and the second sliding surface; the first sliding surface is fixedly connected to the drive disc, and the second sliding surface is used to drive the plunger assembly to move. This configuration avoids direct contact between the drive disc and the plunger assembly through the drive bearing. When the drive disc rotates, the first sliding surface rotates synchronously with the drive disc, while the second sliding surface is in contact with the plunger assembly and, under the action of the balls, does not rotate with the first sliding surface, only changing the position of the lowest point of the second sliding surface.

[0009] Preferably, the series-wound motor is provided with a drive rod that extends into the mounting portion, and a cooperating transmission structure is provided between the drive rod and the mounting plate. With this configuration, the mounting plate can be driven to rotate via the drive rod, and the drive plate, under the influence of the mounting plate, presses against the plunger assembly below.

[0010] Preferably, the transmission structure is a gear meshing mechanism, and the mating surfaces of the drive rod and the mounting plate are provided with meshing convex teeth. With this configuration, when the drive rod rotates, the meshing action between the convex teeth drives the mounting plate to rotate.

[0011] Preferably, a limiting bearing is installed inside the connecting part. The outer ring of the limiting bearing is fixedly installed inside the connecting part, and the inner ring of the limiting bearing is fixedly inserted into the rotating shaft. This configuration allows the rotating shaft to be fixed by the limiting bearing, preventing damage due to violent shaking during rotation.

[0012] Preferably, the base is provided with an inlet and an outlet. The inlet is connected to the plunger hole, and the plunger hole has a through hole, which is connected to the outlet. With this configuration, water can be transmitted through the inlet to the plunger hole for pressurization, and the pressurized high-pressure water then reaches the outlet through the through hole.

[0013] Preferably, the base is provided with a water guiding cavity, through which the water inlet and the plunger orifice are connected, and a one-way valve assembly is provided within the water guiding cavity. This configuration allows the one-way valve assembly to limit the direction of water flow, ensuring that water in the plunger orifice does not flow back when the plunger assembly is pressurized.

[0014] Preferably, the base is provided with a water flow channel, which is a three-way structure. The inlet of the water flow channel is connected to the perforation, one outlet of the water flow channel is connected to the water outlet, and the other outlet is connected to a pressure regulating valve assembly. With this configuration, when the internal air pressure of the plunger pump is abnormal, the pressure in the water flow channel can be adjusted through the pressure regulating valve assembly to ensure that the air pressure inside the plunger pump remains stable.

[0015] Preferably, a connecting body is installed between the pump body and the base. The plunger assembly includes a plunger rod and an elastic element sleeved with the plunger rod. The connecting body has a mounting hole aligned with the plunger bore. The plunger rod is slidably mounted in the mounting hole. A limiting part is provided on the plunger rod. One end of the elastic element abuts against the limiting part, and the other end abuts against the connecting body. This configuration allows the initial position of the plunger rod to be limited by the supporting action of the elastic element and the limiting part. In the initial state, the elastic element supports the plunger rod, allowing water to enter the plunger bore. When the plunger rod moves downward, the limiting part compresses the spring and stores elastic force, squeezing the water in the plunger bore into the perforation. When the plunger rod is no longer compressed, the elastic element pushes the plunger rod upward and returns it to its initial position.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: The pump body is divided into an installation section, a connection section, and a drive section. The overall dimensions of the pump body can be designed according to the size of the drive assembly, ensuring that the overall contour of the pump body fits the drive assembly more closely. This not only reduces the overall space occupied by the plunger pump but also saves costs. The connection section is equipped with a limit bearing that can limit the rotation of the shaft, effectively reducing the amount of shaking during shaft rotation and thus improving the service life of the plunger pump.

[0017] The drive bearing can prevent the drive disc from directly contacting the plunger assembly. When the drive disc rotates, the first sliding surface rotates synchronously with the drive disc, while the second sliding surface is in contact with the plunger assembly and does not rotate with the first sliding surface under the action of the balls, thereby avoiding scraping between the plunger assembly and the drive bearing. This utility model has the advantages of small size, stable operation and long service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the plunger pump in this application.

[0019] Figure 2 This is a schematic diagram of the base structure in this application.

[0020] Figure 3 This is a schematic diagram of the pump body in this application.

[0021] Figure 4 This is a partial cross-sectional structural diagram of the plunger pump in this application.

[0022] Figure 5 This is a schematic diagram of the structure of the driving component in this application.

[0023] Figure 6 This is a schematic diagram of the installation structure of the plunger assembly in this application.

[0024] In the diagram: 1. Pump body; 11. Mounting part; 12. Connecting part; 13. Drive part; 100. Series-wound motor; 101. Drive rod; 2. Base; 21. Plunger hole; 22. Inlet; 23. Outlet; 200. Drive bearing; 3. Drive assembly; 31. Mounting plate; 32. Rotary shaft; 33. Drive plate; 300. Limit bearing; 4. Plunger assembly; 41. Plunger rod; 42. Elastic element; 400. Pressure regulating valve assembly; 410. Limiting part. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0029] One aspect of this application provides a series-wound piston pump, one preferred embodiment of which is, for example... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the pump includes a pump body 1 and a base 2 connected to the pump body 1. A series-wound motor 100 is mounted on the pump body 1. The pump body 1 is provided with a mounting part 11, a connecting part 12 and a driving part 13 from top to bottom. The size of the connecting part 12 is smaller than the size of the mounting part 11 and the driving part 13. A driving assembly 3 that cooperates with the series-wound motor 100 is installed inside the pump body 1. The driving assembly 3 passes through the mounting part 11, the connecting part 12 and the driving part 13 in sequence, so that the pump body 1 and the driving assembly 3 fit more closely. This not only reduces the overall space occupied by the plunger pump, but also saves costs.

[0030] Furthermore, such as Figure 4 As shown, a slidable plunger assembly 4 is provided inside the pump body 1, and a plunger hole 21 is provided on the base 2. The drive assembly 3 is used to drive the plunger assembly 4 to move closer to or further away from the plunger hole 21. When the plunger pump starts, the series-wound motor 100 can drive the drive assembly 3 to control the plunger assembly 4 to reciprocate within the plunger hole 21, thereby pressurizing the water within the plunger hole 21.

[0031] Specifically, such as Figure 4 and Figure 5 As shown, the drive assembly 3 includes a mounting plate 31, a rotating shaft 32, and a drive plate 33. The mounting plate 31 is rotatably mounted on the mounting part 11, and the drive plate 33 is mounted on the drive part 13. The mounting plate 31 and the drive plate 33 are integrally connected by the rotating shaft 32. When the mounting plate 31 rotates, the drive plate 33 can rotate synchronously. Furthermore, the inclined drive plate 33 can change the position of its lowest point by rotating. When the drive plate 33 contacts the plunger assembly 4, as the drive plate 33 rotates, the lowest point of the drive plate 33 gradually approaches the plunger assembly 4 and pushes the plunger assembly 4 to move, thereby pressurizing the water in the plunger hole 21.

[0032] It is understandable that the mounting plate 31, drive plate 33, and shaft 32 are all consumable parts, so they are designed to be detachable, allowing for individual replacement if any one of them is damaged. In addition, to prevent relative rotation between the shaft 32 and the mounting plate 31 or drive plate 33, limiting mechanisms can be provided at both ends of the shaft 32 to limit the movement of the mounting plate 31 and drive plate 33.

[0033] It should be understood that the drive disc 33 drives the plunger assembly 4 to reciprocate by rotating on its own. When the drive disc 33 comes into contact with the plunger assembly 4, scraping will occur, which will accelerate the wear of the plunger assembly 4 and the drive disc 33.

[0034] Therefore, in this embodiment, as Figure 4 and Figure 5 As shown, a drive bearing 200 is mounted on the drive disc 33. The drive bearing 200 includes a first sliding surface and a second sliding surface, with multiple balls installed between the first and second sliding surfaces. The first sliding surface is fixedly connected to the drive disc 33, and the second sliding surface is used to drive the plunger assembly 4 to move. The relative rotation between the first and second sliding surfaces prevents the drive disc 33 from directly contacting the plunger assembly 4. When the drive disc 33 rotates, the first sliding surface rotates synchronously with the drive disc 33, while the second sliding surface is in contact with the plunger assembly 4 and, under the action of the balls, does not rotate with the first sliding surface, only changing the position of the lowest point of the second sliding surface.

[0035] In this embodiment, as Figure 4 As shown, a drive rod 101 is provided on the series-wound motor 100, with a portion of the drive rod 101 extending into the mounting portion 11. A transmission structure is provided between the drive rod 101 and the mounting plate 31. When the series-wound motor 100 is working, the drive rod 101 drives the mounting plate 31 to rotate, and the drive plate 33, driven by the mounting plate 31, pressurizes the plunger assembly 4 below, ensuring that the series-wound motor 100 can control the plunger assembly 4 to pressurize the water in the plunger hole 21.

[0036] Specifically, the transmission structure is a gear meshing, and the mating surfaces of the drive rod 101 and the mounting plate 31 are provided with meshing convex teeth; when the drive rod 101 rotates, the mounting plate 31 can be driven to rotate through the meshing action between the convex teeth.

[0037] It should be understood that the length of the rotating shaft 32 in the prior art is generally long, and it cannot be guaranteed that the center of gravity of the drive disk 33 is on the same straight line as the axis of the rotating shaft 32. When the rotation speed of the rotating shaft 32 is high, the rotating shaft 32 may break due to its own unbalanced force.

[0038] To address the aforementioned problems, in some embodiments of this application, such as Figure 4As shown, a limiting bearing 300 is installed inside the connecting part 12. The outer ring of the limiting bearing 300 is fixedly installed inside the connecting part 12, and the inner ring of the limiting bearing 300 is fixedly inserted into the rotating shaft 32. The limiting bearing 300 limits the position of the rotating shaft 32, preventing the rotating shaft 32 from being damaged due to its own violent shaking during rotation.

[0039] In this embodiment, as Figure 1 and Figure 5 As shown, the base 2 is provided with an inlet 22 and an outlet 23. The inlet 22 is connected to the plunger hole 21, which has a perforation that connects to the outlet 23. When the plunger pump starts, water can enter the plunger hole 21 through the inlet 22 and be pressurized. The pressurized high-pressure water then reaches the outlet 23 through the perforation.

[0040] Specifically, such as Figure 2 As shown, a water guiding cavity is provided inside the base 2. The water inlet 22 and the plunger hole 21 are connected through the water guiding cavity, and a one-way valve assembly is provided inside the water guiding cavity. By limiting the direction of water flow through the one-way valve assembly, it can be ensured that the water in the plunger hole 21 will not flow back when the plunger assembly 4 is pressurized.

[0041] Specifically, such as Figure 2 As shown, a water flow channel is provided inside the base 2. The water flow channel has a three-way structure, in which the inlet of the water flow channel is connected to the perforation, one outlet of the water flow channel is connected to the outlet 23, and the other outlet is connected to the pressure regulating valve assembly 400. When the air pressure inside the plunger pump is abnormal, the pressure in the water flow channel can be adjusted by the pressure regulating valve assembly 400 to ensure that the air pressure inside the plunger pump is always stable.

[0042] In this embodiment, as Figure 6 As shown, a connector is installed between the pump body 1 and the connecting seat. The plunger assembly 4 includes a plunger rod 41 and an elastic element 42 sleeved with the plunger rod 41. The connector has a mounting hole aligned with the plunger hole 21. The plunger rod 41 is slidably installed in the mounting hole. A limiting part 410 is provided on the plunger rod 41. One end of the elastic element 42 abuts against the limiting part 410, and the other end abuts against the wall of the connector to ensure that the plunger rod 41 can be supported by the elastic element 42. The initial position of the plunger rod 41 is limited by the elastic element 42. In the initial state, the elastic element 42 supports the plunger rod 41, and water can enter the plunger hole 21. When the plunger rod 41 moves down, the limiting part 410 compresses the spring and stores the elastic force, squeezing the water in the plunger hole 21 into the perforation. When the plunger rod 41 is not compressed, the elastic element 42 pushes the plunger rod 41 up and returns it to the initial position.

[0043] It should be noted that a certain gap should be left between the plunger rod 41 and the plunger hole 21 so that water in the plunger cavity can enter the perforation through this gap.

[0044] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A series-wound piston pump, comprising a pump body (1) and a base (2) connected to the pump body (1), characterized in that, A series-wound motor (100) is installed on the pump body (1). The pump body (1) is provided with a mounting part (11), a connecting part (12) and a driving part (13) from top to bottom. The size of the connecting part (12) is smaller than the size of the mounting part (11) and the driving part (13). A driving assembly (3) that cooperates with the series-wound motor (100) is installed inside the pump body (1). The driving assembly (3) passes through the mounting part (11), the connecting part (12) and the driving part (13) in sequence. A slidable plunger assembly (4) is provided inside the pump body (1). A plunger hole (21) is provided on the base (2). The driving assembly (3) is used to drive the plunger assembly (4) to move closer to or away from the plunger hole (21).

2. The series-wound piston pump as described in claim 1, characterized in that, The drive assembly (3) includes a mounting plate (31), a rotating shaft (32) and a drive plate (33). The mounting plate (31) is rotatably mounted on the mounting part (11), and the drive plate (33) is obliquely mounted on the drive part (13). Both the drive plate (33) and the mounting plate (31) are fixedly connected to the rotating shaft (32).

3. The series-wound piston pump as described in claim 2, characterized in that, A drive bearing (200) is mounted on the drive disc (33). The drive bearing (200) includes a first sliding surface and a second sliding surface. A plurality of balls are installed between the first sliding surface and the second sliding surface. The first sliding surface is fixedly connected to the drive disc (33), and the second sliding surface is used to drive the plunger assembly (4) to move.

4. The series-wound piston pump as described in claim 2, characterized in that, The series-wound motor (100) is provided with a drive rod (101), the drive rod (101) extends into the mounting part (11), and a transmission structure is provided between the drive rod (101) and the mounting plate (31) for mutual cooperation.

5. The series-wound piston pump as described in claim 4, characterized in that, The transmission structure is a gear meshing, and the mating surfaces of the drive rod (101) and the mounting plate (31) are provided with meshing convex teeth.

6. The series-wound piston pump as described in claim 2, characterized in that, A limiting bearing (300) is installed inside the connecting part (12). The outer ring of the limiting bearing (300) is fixedly installed inside the connecting part (12), and the inner ring of the limiting bearing (300) is fixedly inserted into the rotating shaft (32).

7. The series-wound piston pump as described in claim 1, characterized in that, The base (2) is provided with an inlet (22) and an outlet (23). The inlet (22) is connected to the plunger hole (21). The plunger hole (21) is provided with a perforation. The plunger hole (21) is connected to the outlet (23) through the perforation.

8. The series-wound piston pump as described in claim 7, characterized in that, The base (2) is provided with a water guiding cavity, the water inlet (22) and the plunger hole (21) are connected through the water guiding cavity, and a one-way valve assembly is provided in the water guiding cavity.

9. The series-wound piston pump as described in claim 7, characterized in that, The base (2) is provided with a water flow channel. The water flow channel has a three-way structure. The inlet of the water flow channel is connected to the plunger hole (21) through the perforation. One of the outlets of the water flow channel is connected to the water outlet (23). The other outlet is connected to a pressure regulating valve assembly (400).

10. The series-wound piston pump as described in claim 1, characterized in that, A connecting body is installed between the pump body (1) and the base (2). The plunger assembly (4) includes a plunger rod (41) and an elastic element (42) sleeved with the plunger rod (41). The connecting body is provided with a mounting hole aligned with the plunger hole (21). The plunger rod (41) is slidably installed in the mounting hole. A limiting part (410) is provided on the plunger rod (41). One end of the elastic element (42) abuts against the limiting part (410), and the other end abuts against the connecting body.

Images