Cooling electric water pump with variable pump body flow channel section

Abstract

The utility model discloses a cooling electric water pump with a variable pump body flow channel section, and relates to the technical field of automobile pumps, in particular to a pump body, a water pump motor and an electric water pump driving unit, the pump body comprises a volute, the volute is provided with a water inlet and a water outlet which are communicated with an inner cavity of the volute, the middle of the inner cavity of the volute is movably connected with an impeller, and the impeller is connected with the water pump motor. The water inlet end of the impeller is movably connected with the water outlet end of the water inlet, a flow channel is formed between the impeller and the volute, volute movable plates are evenly and movably connected into an inner cavity of the flow channel, an adjusting structure is arranged on the volute, the volute movable plates are driven by the adjusting structure, and the electric water pump driving unit controls the adjusting structure to work. According to the cooling electric water pump with the variable pump body flow channel section, the volute movable plate is arranged in the volute, the angle of the volute movable plate is changed according to requirements, the size of the overflowing section of the volute is variable, and the problem that the electric water pump cannot keep high-efficiency operation within a wide flow range is solved through algorithm control.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile pump, concretely is a pump body flow passage section variable cooling electric water pump. BACKGROUND

[0002] Because fuel cell and internal combustion engine system heat consumption is bigger, so require system to have better heat management, generally fuel cell and internal combustion engine system configuration cooling water pump power is bigger, simultaneously, vehicle system needs to face different use working condition, corresponding working condition system heat consumption is also different, this is also different to cooling system's radiating capacity requirement. Traditional heat management water pump is driven directly by engine or through the mode of changing electronic cooling water pump rotation speed to adjust the radiating capacity of system, result in cooling water pump has following defects when using:

[0003] 1) cooling water pump flow head deviates design point, efficiency is very poor;

[0004] 2) cooling water pump often operates in non-efficient area, NVH is very poor, often receives customer complaints;

[0005] 3) cooling water pump compatibility is very poor, often because cooling system radiating demand is not same, manufacturer needs to develop new cooling water pump to meet flow head demand, causes waste of financial and material resources.

[0006] Nowadays, energy saving and emission reduction are advocated, and traditional water pumps cannot work at high efficiency in a wide range of flow and head, which cannot keep up with the pace of social development. INVENTION CONTENTS

[0007] The utility model provides a pump body flow passage section variable cooling electric water pump, solve the problem that water pump cannot keep high efficiency operation in wide flow range in above -mentioned background art.

[0008] The utility model provides following technical scheme: a pump body flow passage section variable cooling electric water pump, including pump body, water pump motor and electric water pump drive unit, the pump body includes volute, be equipped with with volute inner chamber intercommunication water inlet and water outlet on the volute, the middle part swing joint of volute inner chamber has impeller, the water inlet end of impeller is swing joint with the water outlet end of water inlet, the flow passage is formed between the impeller and volute, the inner chamber in flow passage is evenly swing joint with volute movable board, be equipped with adjusting structure on the volute, volute movable board is driven through adjusting structure, electric water pump drive unit controls adjusting structure work.

[0009] Preferably, the flow passage is uniformly connected with a rotating shaft on one side close to the impeller, one end of the volute movable plate is fixedly connected with the rotating shaft, and the other end of the rotating shaft extends to the outside of the volute.

[0010] Preferably, the adjustment structure includes a transmission gear ring movably connected to the volute, a servo motor connected to the volute, and a driven gear ring fixedly connected to the end of the rotating shaft away from the movable plate of the volute. The output shaft end of the servo motor is fixedly connected to a drive gear. Both the drive gear and the driven gear ring mesh with the transmission gear ring. The electric water pump drive unit is connected to the drive unit of the servo motor.

[0011] Preferably, a connecting ring is fixedly connected to the side of the transmission gear ring near the volute, and the other end of the connecting ring is movably connected to the volute.

[0012] Preferably, a motor housing is fixedly connected to the top of the volute, a sealing plate is provided between the volute and the motor housing, a water pump motor is fixedly connected to the middle of the inner cavity of the motor housing, a pump shaft is connected to the end of the output shaft of the water pump motor, the other end of the pump shaft passes through the sealing plate and is connected to the middle of the impeller, and the pump shaft is movably connected to the sealing plate.

[0013] Preferably, an electric water pump drive unit is provided inside the motor housing, and the electric water pump drive unit is electrically connected to the water pump motor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This variable cross-section cooling electric water pump features a movable plate inside the volute casing. The angle of the movable plate can be changed according to requirements, making the size of the volute casing's flow cross-section variable. Combined with algorithm control, this solves the problem that electric water pumps cannot maintain high efficiency operation over a wide flow range.

[0016] 2. This variable cross-section cooling water pump ensures the efficiency of the cooling water pump and improves its compatibility by changing the cross-sectional dimensions of the volute. Attached Figure Description

[0017] Figure 1 This is a front view of the structure of this utility model;

[0018] Figure 2 This is a bottom view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the pump body of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the structure of this utility model;

[0021] Figure 5 The structure of this utility model Figure 4 Diagram showing the view from below;

[0022] Figure 6 This is a schematic diagram of the movable plate of the volute structure of this utility model.

[0023] Fig. 1, volute; 2, motor shell; 3, water inlet; 4, water outlet; 5, impeller; 6, rotating shaft; 7, volute movable plate; 8, driven gear ring; 9, servo motor; 10, driving gear; 11, transmission gear ring; 12, flow channel; 13, electric water pump driving unit; 14, water pump motor; 15, pump shaft; 16, sealing plate; 17, connecting ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] The utility model provides a kind of pump body flow passage cross section variable cooling electric water pump, including pump body, water pump motor 14 and electric water pump driving unit 13.Pump body includes volute 1, volute 1 is set with water inlet 3 and water outlet 4 being communicated with volute 1 inner cavity, in some embodiments of the present application, water inlet 3 is located in the middle of volute 1 bottom, volute 1 side wall is provided with water outlet 4, as shown in Figures 1 to 5 .

[0026] The middle part of volute 1 inner cavity is movably connected with impeller 5, the water inlet end of impeller 5 is movably connected with the water outlet end of water inlet 3, flow channel 12 is formed between impeller 5 and volute 1, when impeller 5 rotates, under the pressure boosting effect of impeller, water can enter into flow channel 12 through water inlet 3, and the water in flow channel 12 flows out through water outlet 4.

[0027] The inner cavity of the flow channel 12 is uniformly movably connected with the volute movable plate 7, the side of the flow channel 12 close to the impeller 5 is uniformly movably connected with the rotating shaft 6, one end of the volute movable plate 7 is fixedly connected with the rotating shaft 6, and the other end of the rotating shaft 6 extends to the outside of the volute 1. The volute 1 is provided with an adjusting structure, the volute movable plate 7 is driven through the adjusting structure, the adjusting structure comprises a transmission gear ring 11, a servo motor 9 and a driven gear ring 8 fixedly connected with the other end of the rotating shaft 6 away from the volute movable plate 7. The side of the transmission gear ring 11 close to the volute 1 is fixedly connected with a connecting ring 17, the other end of the connecting ring 17 is movably connected with the volute 1, and the transmission gear ring 11 is movably connected with the volute 1 through the connecting ring 17; the servo motor 9 is fixedly connected with the volute 1, the output shaft of the servo motor 9 is fixedly connected with a driving gear 10, the driving gear 10 and the driven gear ring 8 are all in meshing connection with the transmission gear ring 11, through the setting of the adjusting structure, the rotation of the servo motor 9 can drive the driving gear 10 fixedly connected therewith to rotate, the driving gear 10 drives the transmission gear ring 11 in meshing connection therewith to rotate, the transmission gear ring 11 drives the rotating shaft 6 in meshing connection therewith to rotate through the driven gear ring 8, and the rotating shaft 6 drives the volute movable plate 7 connected therewith to rotate, the opening cross-sectional dimension between the adjacent two volute movable plates 7 can be changed, thereby the flow cross section of the volute 1 is changed, so that the electric water pump can meet various requirements and the adaptability of the electric water pump is improved.

[0028] When the electric water pump needs to run at large flow, the volute movable plate 7 is driven to rotate by the adjusting structure, and the opening cross-sectional dimension between the two adjacent volute movable plates 7 is increased, at this time, the flow cross-sectional area of the volute 1 is increased; the maximum flow cross-sectional area is 100%;

[0029] When the electric water pump needs to run at small flow, the volute movable plate 7 is driven to rotate by the adjusting structure, and the opening cross-sectional dimension between the two adjacent volute movable plates 7 is decreased, at this time, the flow cross-sectional area of the volute 1 is correspondingly decreased; the minimum flow cross-sectional area is 0%.

[0030] The top of the volute 1 is fixedly connected with a motor shell 2, a sealing plate 16 is arranged between the volute 1 and the motor shell 2, the middle of the inner cavity of the motor shell 2 is fixedly connected with a water pump motor 14, the output shaft of the water pump motor 14 is connected with a pump shaft 15, the other end of the pump shaft 15 penetrates through the sealing plate 16 and is connected with the middle of the impeller 5, and the pump shaft 15 is movably connected with the sealing plate 16. An electric water pump driving unit 13 is arranged in the motor shell 2, the electric water pump driving unit 13 is electrically connected with the water pump motor 14, and the electric water pump driving unit 13 can drive the water pump motor 14 to work.

[0031] The electric water pump driving unit 13 controls the adjustment structure to work. The electric water pump driving unit 13 is connected with the driving unit of the servo motor 9, and the electric water pump driving unit 13 and the driving unit of the servo motor 9 interact with each other. The electric water pump driving unit 13 and the driving unit of the servo motor 9 can adopt wired transmission or wireless transmission to interact with each other. In this case, no limitation is made. The control principle of the volute movable plate 7 of the electric water pump in use is as follows:

[0032] I. Calibrating the performance parameters of the electric water pump at different rotating speeds, different temperatures and different angles of the volute movable plate 7;

[0033] II. The electric water pump driving unit 13 receives the rotating speed command of the fuel cell reactor system and the internal combustion engine cooling system, and the electric water pump runs at a fixed rotating speed. At the same time, the electric water pump driving unit 13 sends the rotating speed command to the driving unit of the servo motor 9. The driving unit of the servo motor 9 controls the servo motor 9 to rotate at a certain angle. The rotation of the servo motor 9 drives the volute movable plate 7 to rotate, until the volute movable plate 7 moves to the best position at the highest efficiency point of the current rotating speed of the electric water pump. At the same time, the driving unit of the servo motor 9 feeds back the position parameter of the volute movable plate 7 to the electric water pump driving unit 13.

[0034] III. The electric water pump driving unit 13 collects the power P1 at the above rotating speed, and compares P1 with the highest efficiency point power P of the calibration theory.

[0035] A. If the deviation meets the requirements, the position parameter of the volute movable plate 7 is sent to the driving unit of the servo motor 9, so that the volute movable plate 7 keeps the current position parameter running;

[0036] B. If the deviation does not meet the requirements, the angle of the volute movable plate 7 is recalculated and sent to the driving unit of the servo motor 9. The driving motor executes the new position parameter of the volute movable plate 7 until P1 and P meet the deviation requirements.

[0037] IV. When the received rotating speed command of the fuel cell reactor system and the internal combustion engine cooling system changes, the above steps II and III are re-executed.

[0038] In summary: when the pump body flow passage cross section variable cooling electric water pump is used, the volute movable plate 7 can rotate according to the requirements, changes the opening cross section size between two adjacent volute movable plates 7, so that when the electric water pump needs to run at large flow, the opening cross section size between two adjacent volute movable plates 7 increases, and when the electric water pump needs to run at small flow, the opening cross section size between two adjacent volute movable plates 7 decreases, which improves the working efficiency and compatibility of the cooling electric water pump, and the electric water pump can run at high efficiency in a wide flow range.

[0039] The utility model uses to standard parts can be bought from market, and the special-shaped part can be ordered according to the record of specification and drawing, and the specific connecting mode of each part all adopts the conventional means such as bolt in prior art, and the machinery, parts and equipment all adopt conventional model in prior art, and this will not be described in detail, the content not being described in detail in the specification belongs to the prior art known to the person skilled in the art, although the embodiment of the utility model has been shown and described, for the ordinary skilled person in the art, it can be understood that the embodiment can be changed, modified, replaced and modified in various ways without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A variable cooling electric water pump comprising a pump body, a water pump motor (14) and an electric water pump drive unit (13), characterized in that: The pump body comprises a volute (1), the volute (1) is provided with a water inlet (3) and a water outlet (4) which are communicated with the inner cavity of the volute (1), the middle part of the inner cavity of the volute (1) is movably connected with an impeller (5), the water inlet end of the impeller (5) is movably connected with the water outlet end of the water inlet (3), the flow channel (12) is formed between the impeller (5) and the volute (1), the inner cavity of the flow channel (12) is uniformly movably connected with a volute movable plate (7), the volute (1) is provided with an adjusting structure, the volute movable plate (7) is driven by the adjusting structure, and the electric water pump driving unit (13) controls the working of the adjusting structure.

2. A cooling electric water pump with variable cross section of the flow channel in the pump body according to claim 1, characterized in that: The side of the flow channel (12) close to the impeller (5) is movably connected with a rotating shaft (6), one end of the volute movable plate (7) is fixedly connected with the rotating shaft (6), and the other end of the rotating shaft (6) extends to the outside of the volute (1).

3. A cooling electric water pump with variable cross section of the flow channel in the pump body according to claim 2, characterized in that: The adjusting structure comprises a transmission gear ring (11) movably connected with the volute (1), a servo motor (9) connected with the volute (1), and a driven gear ring (8) fixedly connected with the other end of the rotating shaft (6) away from the volute movable plate (7), the output shaft of the servo motor (9) is fixedly connected with a driving gear (10), the driving gear (10) and the driven gear ring (8) are engaged with the transmission gear ring (11), and the electric water pump driving unit (13) is connected with the driving unit of the servo motor (9).

4. A cooling electric water pump with variable cross section of the flow channel in the pump body according to claim 3, characterized in that: The side of the transmission gear ring (11) close to the volute (1) is fixedly connected with a connecting ring (17), and the other end of the connecting ring (17) is movably connected with the volute (1).

5. A cooling electric water pump with variable cross section of the flow channel in the pump body according to claim 1, characterized in that: The top of the volute (1) is fixedly connected with a motor shell (2), a sealing plate (16) is arranged between the volute (1) and the motor shell (2), the middle part of the inner cavity of the motor shell (2) is fixedly connected with a water pump motor (14), the output shaft of the water pump motor (14) is connected with a pump shaft (15), the other end of the pump shaft (15) penetrates through the sealing plate (16) and is connected with the middle part of the impeller (5), and the pump shaft (15) is movably connected with the sealing plate (16).

6. A cooling electric water pump with variable cross section of the flow channel in the pump body according to claim 5, characterized in that: The motor shell (2) is provided with an electric water pump driving unit (13), and the electric water pump driving unit (13) is electrically connected with the water pump motor (14).

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