Water pump and cooling system and engineering machinery comprising same

Abstract

The utility model relates to a water pump, a cooling system comprising the water pump and engineering machinery comprising the water pump or the cooling system. The water pump comprises a pump body, a pump cover, an impeller and at least one observation mirror. The pump cover is connected with the pump body to form a pump cavity; the impeller is located in the pump cavity and adjacent to the pump cover. The observation mirror is arranged in at least one corresponding hole in the pump cover, and the at least one hole is communicated with the pump cavity, so that the at least one observation mirror allows the liquid level in the pump cavity to be observed. According to the utility model, the liquid level in the pump cavity of the water pump can be visually observed through the observation mirror, so that the test time and cost of the pump liquid performance of the water pump are saved; the observation mirror is arranged on the pump cover which is limited together with the pump body and is internally provided with the impeller, and the observation mirror is close to the impeller, so that the pumping condition of the impeller in the pump cavity can be reflected most directly. According to the scheme, an operator can exhaust the water pump in time, and the situation that the pump flow cannot meet the set requirement is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of parts of engineering machinery, in particular to a water pump, a cooling system comprising the water pump, and engineering machinery comprising the water pump or the cooling system. Background Art

[0002] Some components on construction machinery require cooling systems to dissipate heat. For example, with the rise of electric propulsion, more and more construction machinery is using new energy powertrains instead of engines. New energy powertrains involve a wider range of components, including motors, motor controllers, and chargers. These components typically require cooling systems, and pumps are required to keep the coolant flowing within these systems.

[0003] The water circuits of these cooling systems are usually complex, which can easily lead to difficulty in exhausting the cooling system or coolant leakage, and the water inlet end of the water pump is prone to air trapping. These gases mixed in the coolant will hinder the normal flow of the liquid and cause the water pump flow to fail to meet the set requirements.

[0004] In existing technologies, it's difficult to determine whether the pump's flow rate meets requirements or whether air is trapped. This often requires extensive testing. During actual cooling system operation, it's even more difficult to determine the pump's internal conditions in real time, posing the risk of insufficient cooling and even safety hazards. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a water pump is provided, comprising a pump body, a pump cover, an impeller, and at least one sight glass. The pump cover is coupled to the pump body to form a pump chamber; the impeller is positioned within the pump chamber and adjacent to the pump cover; the sight glass is disposed in at least one corresponding hole in the pump cover, the at least one hole communicating with the pump chamber, such that the at least one sight glass allows observation of the liquid level within the pump chamber.

[0007] In this solution, the liquid level in the pump chamber can be visually observed through the observation mirror, making it easy to understand the pumping status of the water pump, saving time and cost in testing the pump's pumping performance. Furthermore, because the observation mirror is located on the pump cover, which together with the pump body defines the impeller therein, and is close to the impeller, it can most directly reflect the pumping status at the impeller in the pump chamber. This solution not only allows the performance of the pumped liquid volume to be observed during water pump testing, but also during actual operation. This solution enables operators to intervene in the water pump in a timely manner, such as by venting the pump, to avoid situations where the water pump flow rate fails to meet the set requirements.

[0008] According to an example of the present invention, the at least one observation mirror is a plurality of observation mirrors, and correspondingly the at least one hole is a plurality of holes.

[0009] Through multiple observation mirrors, observation can be carried out from various positions to meet the needs of different observation positions, and different observation mirrors can be adapted to different water pump installation orientations.

[0010] According to one embodiment of the present invention, the plurality of holes are arranged at equal intervals circumferentially relative to the central axis of the water pump. The holes and the corresponding sight glasses in the holes may be spaced at intervals of, for example, 90 degrees, 60 degrees, 30 degrees, or 15 degrees. This arrangement ensures that, regardless of the water pump's installation orientation, a corresponding sight glass is provided to meet the liquid level requirements for that installation orientation.

[0011] According to one example of the present invention, a water inlet is provided at the center of the pump cover, wherein the at least one hole is radially closer to the water inlet than to the outer periphery of the pump cover. In this solution, since the hole and the observation mirror in the hole are disposed closer to the water inlet, on the one hand, since air is easily trapped near the water inlet within the pump chamber, this location allows for better monitoring of this situation. On the other hand, since the centrifugal force and water pressure of the coolant are lower at this radial inner side, the coolant is less likely to leak through the hole at this location.

[0012] According to one embodiment of the present invention, a vortex is formed on the inner side of the pump cover, and at least one of the holes is located on the vortex. Because the flow conditions in the vortex are complex and air entrapment is prone to occur, providing an observation mirror there can better observe whether the coolant reaches this location. If the coolant does not reach this location, it indicates that air entrapment has occurred.

[0013] According to one embodiment of the present invention, at least one of the holes is a screw plug hole for the water pump. This solution places an observation mirror in the existing screw plug hole of the water pump. When air needs to be released through the screw plug hole, the observation mirror is simply unscrewed from the screw plug hole and then screwed back in for continued observation. This eliminates the need for an additional hole for the observation mirror in the pump cover, simplifying the water pump structure.

[0014] According to one example of the present invention, the observation mirror includes an annular mounting member and a lens connected to the mounting member. The mounting member is connected to the pump cover within the corresponding hole. The lens is, for example, a convex lens. The provision of the mounting member can more stably fix the lens.

[0015] According to an example of the present invention, the water pump is an electronic water pump.

[0016] According to another aspect of the present invention, a cooling system is provided. The cooling system includes the water pump described above.

[0017] According to another aspect of the present invention, a construction machine is provided. The construction machine includes the water pump or the cooling system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limiting the present invention, wherein:

[0019] Figure 1 A perspective view of a water pump according to an embodiment of the present invention is shown.

[0020] Figure 2 Show Figure 1 Shown is a front view of the water pump without the sight glass.

[0021] Figure 3 Show Figure 1 Schematic diagram of the water pump sight glass shown. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented without some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, it is contemplated that the present invention may be implemented using any combination of the features and elements described below, regardless of whether they relate to different embodiments.

[0023] The terms "comprising" and "having" are used hereinafter in an open-ended inclusive sense and mean that there may be additional elements / components other than the listed elements / components.

[0024] Figure 1 and Figure 2FIG. 1 shows a water pump according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the water pump according to this embodiment may include a pump body 1, a pump cover 2, an impeller (not shown) and at least one observation mirror 3. The pump cover 2 may be connected to the pump body 1 to engage with the pump body 1 to form a closed pump chamber (not shown), and the impeller is arranged in the pump chamber and adjacent to the pump cover 2. A hole 21 communicating with the pump chamber may be provided on the pump cover 2 at the position of the lowest desired liquid level. The number of holes 2 may be one or more, and one or more corresponding observation mirrors 3 may also be provided. Each observation mirror 3 is installed in the corresponding hole 21 and is sealingly engaged in the hole 21. The liquid level in the pump chamber can be observed through any one of the observation mirrors 3. Each hole 21 is provided at a different position, which is advantageous in that when the water pump is in different installation directions, there are suitable holes 21 and observation mirrors therein to adapt to the required liquid level in that orientation. For example, Figure 1 An installation direction of the water pump is shown. In this installation direction, the position of the observation mirror 3 at the uppermost end is adapted to the liquid level height requirement when the water pump is working in this orientation. That is, when the observation mirror 3 can observe the liquid, it indicates that the current pumping liquid situation of the water pump meets the liquid level height requirement. Otherwise, it indicates that the liquid level height in the pump chamber has not reached the minimum expected liquid level height in this installation orientation, the pumping liquid volume does not meet the requirement, and measures such as exhaust need to be taken.

[0025] A water pump is typically installed with its central axis horizontally. The minimum desired liquid level must be above the central axis to ensure adequate pumping capacity. Therefore, arranging the multiple holes 21 at equal intervals around the central axis of the water pump helps ensure that at least one sight glass 3 is always located at or above the minimum desired liquid level in all common pump installation orientations (e.g., 0, 90, 180, and 270 degrees).

[0026] Continue to refer Figure 1 and Figure 2 As shown, a water inlet 22 is provided at the center of the pump cover 2, and a plurality of holes 21 and corresponding observation mirrors 3 are arranged at equal intervals around the circumference of the water inlet 22, for example, at intervals of 90°, 60°, 30°, 15°, etc. Moreover, in the radial direction along the pump cover 2, the distance between each hole 21 and the water inlet 22 is closer than the distance between each hole 21 and the outer periphery of the pump cover 2. On the one hand, since air is easily trapped near the water inlet 22 in the pump cavity, arranging the observation mirror there can better monitor this situation. On the other hand, since the centrifugal force of the coolant is smaller and the water pressure is lower there, the coolant is not likely to leak through the hole 21 there.

[0027] In this embodiment, a vortex (not shown) may be formed on the inner side of the pump cover 2, and a water outlet 23 may be formed on the outer periphery of the pump cover, extending outward substantially along a tangential direction of the pump cover 2. Since the flow state in the vortex is complex and air entrapment is prone to occur, providing an observation mirror there allows for better observation of whether the coolant has reached that location. If the coolant has not reached that location, it indicates that air entrapment has occurred.

[0028] Preferably, at least one of the holes 21 is a screw plug hole of the water pump. The screw plug hole in the prior art is constructed to install a screw plug for manual exhaust of the water pump. When exhaust is required, manual exhaust can be performed by unscrewing the screw plug. In the preferred embodiment of the present invention, at least one observation mirror 3 is provided in the screw plug hole. When the observation mirror 3 is removed from the screw plug hole, exhaust can be performed, and the observation mirror 3 can be reinstalled into the screw plug hole after exhaust. Replacing the screw plug in the prior art with the observation mirror 3 can not only play the role of manual exhaust, but also observe the liquid level in the water pump, and there is no need to make an additional mounting hole for the observation mirror.

[0029] Figure 3 The schematic diagram of the observation mirror 3 of this embodiment is shown only as an example. Figure 3 As shown, the observation mirror 3 may include an annular mounting member 31 and a lens 32 connected to the mounting member 31 in an interference fit manner. The outer periphery of each mounting member 31 may be provided with an external thread, and the corresponding hole 21 may be provided with an internal thread, thereby enabling the mounting member 31 to be fixed to the pump cover 2 in the hole 21 in a threaded connection manner. Figure 3 As shown, the middle of the mounting member 31 is a stepped hole that is larger at the top and smaller at the bottom. The mounting member 31 and the lens 32 are enclosed at the step of the stepped hole to form a space for accommodating the sealing ring 33. As a result, the gap at the connection between the lens 32 and the mounting member 31 can be sealed by the sealing ring 33. Of course, in some specific embodiments, the mounting member 31 is constructed to match the screw plug hole so that the observation mirror 3 can be installed in the screw plug hole. In other embodiments, for example, when some holes 21 do not use screw plug holes, the observation mirror 3 can also be directly integrated into the pump cover 2 by insert injection molding.

[0030] The water pump of the above embodiment is preferably an electronic water pump. A motor cavity for receiving the motor is formed on the pump body of the electronic water pump on the side facing away from the pump cover 2. The output end of the motor extends into the pump cavity through the partition wall between the pump cavity and the motor cavity and is connected to the impeller, thereby driving the rotation of the impeller through the motor.

[0031] The utility model also provides a cooling system comprising the water pump, and an engineering machine comprising the water pump or the cooling system.

[0032] Industrial Applicability

[0033] The water pump according to the present invention is particularly suitable for the cooling system of parts in new energy engineering machinery. However, it should be understood that the water pump according to the present invention can also be used for other equipment that requires cooling and heat dissipation.

[0034] According to the water pump of the present invention, at least one observation mirror 3 is set at different positions of the pump cover 2 to observe the liquid level in the pump chamber. In this way, when trapped air is observed in the pump chamber, the air can be exhausted in time, thereby avoiding the situation where the flow rate of the water pump cannot meet the set requirements due to trapped air.

[0035] In addition, the plurality of holes 21 are arranged at equal intervals in the circumferential direction, so that when the water pump is installed in various installation directions, at least one sight glass 3 is located at or above the lowest desired liquid level in the installation direction.

[0036] In addition, the observation mirror is installed at a position closer to the water inlet 22 of the pump cover 2 than the outer periphery of the pump cover 2, so as to better monitor the vicinity of the water inlet where air entrapment is likely to occur. Moreover, since this location is radially inward, the coolant is subjected to small centrifugal force and pressure, and is not prone to leakage through the hole there.

[0037] The observation mirror is installed at the vortex position of the pump cover 2, so that the liquid level at the vortex where the flow state is complex and air is easily trapped can be observed, and the pump liquid condition can be known in time.

[0038] Furthermore, at least one hole 21 is set as a screw plug hole for the water pump. When the water pump needs to be vented, the observation mirror 3 can be directly unscrewed to perform the venting operation. Without the need to add a mounting hole for the observation mirror, both the liquid level observation and the screw plugging function can be realized.

[0039] It will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Other embodiments of the present invention will be apparent to those skilled in the art from the practice of the present invention disclosed herein. This specification and the examples disclosed herein should be considered as illustrative only, and the true scope of the present invention is indicated by the appended claims and their equivalents.

Claims

1. A water pump, characterized in that: The water pump comprises: Pump body (1); a pump cover (2), the pump cover (2) being engaged with the pump body (1) to form a pump chamber; an impeller located in the pump chamber and disposed adjacent to the pump cover (2); and at least one sight glass (3) disposed in a corresponding at least one hole (21) in the pump cover (2), the at least one hole (21) being in communication with the pump chamber, such that the at least one sight glass (3) allows observation of the liquid level in the pump chamber; A water inlet (22) is provided at the center of the pump cover (2), wherein the at least one hole (21) is closer to the water inlet (22) in the radial direction relative to the outer periphery of the pump cover (2); Furthermore, at least one of the holes (21) is a screw plug hole of the water pump.

2. The water pump according to claim 1, wherein the at least one sight glass (3) is a plurality of sight glasses, and correspondingly, the at least one hole (21) is a plurality of holes.

3. The water pump according to claim 2, characterized in that The plurality of holes (21) are arranged at equal intervals in the circumferential direction relative to the central axis of the water pump.

4. The water pump according to any one of claims 1 to 3, characterized in that: A vortex is formed on the inner side of the pump cover (2), and at least one of the holes is located on the vortex.

5. The water pump according to any one of claims 1 to 3, characterized in that: The observation mirror (3) comprises an annular mounting component (31) and a lens (32) connected to the mounting component. The mounting component (31) is connected to the pump cover (2) in the corresponding hole.

6. The water pump according to any one of claims 1 to 3, characterized in that: The water pump is an electronic water pump.

7. A cooling system, characterized in that: Comprising a water pump according to any one of claims 1 to 6.

8. An engineering machine, characterized in that: Comprising a water pump according to any one of claims 1 to 6 or a cooling system according to claim 7.

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