Engine cooling water pump capable of efficiently supplying and conveying cooling liquid

Abstract

The engine cooling water pump capable of efficiently supplying and conveying cooling liquid comprises a pump shell and a pump shaft located in the pump shell, an impeller cavity is formed in the pump shell, a liquid inlet end and a liquid outlet end which are communicated with the impeller cavity are arranged outside the pump shell, an impeller body located in the impeller cavity is installed on the pump shaft in a power mode, and the impeller body is connected with the impeller cavity. A lining sleeve is fixed to the inner wall of the pump shell, and the impeller body is arranged in the lining sleeve. An inner cavity of the bushing cylinder is a gradually-changing cavity, a cavity of the gradually-changing cavity is gradually shrunk from the liquid inlet end to the liquid outlet end in the rotating direction of the impeller body, the impeller body is provided with rubber blades distributed in a circumferential mode, and the edges of the ends of all the rubber blades are attached to the cylinder wall of the bushing cylinder. The lining sleeve is arranged in the pump shell, the inner cavity of the lining sleeve is the gradually-changed cavity, the adjacent rubber blades of the impeller body stretch at the liquid inlet end to fully absorb cooling liquid and contract at the liquid outlet end to fully release and discharge the cooling liquid, and the conveying efficiency of the cooling liquid is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cooling supporting, in particular to an engine cooling water pump for efficiently supplying and conveying coolant. Background Technique

[0002] The cooling water pump conveys the coolant to the heat exchange tank of the engine and cools the engine. The coolant circulates to take away the heat of the engine, so that the engine can maintain normal operation. The cooling water pump is the main equipment for conveying the coolant to the heat exchange tank of the engine. The cooling water pump is generally a small-power water pump. With the development of engine integration and miniaturization, the cooling water pump is also required to have a smaller power (generally smaller in volume) and achieve the purpose of supplying and conveying a large amount of coolant. Due to structural limitations, the existing cooling water pump has low conveying efficiency for the coolant entering from the liquid inlet end of the impeller cavity to the liquid outlet end of the impeller cavity, resulting in the need for a large power for the cooling water pump to reach the coolant flow required by the engine; the structure of the existing cooling water pump will have an unstable phenomenon of large and small conveying flow rates. Therefore, it is necessary to conduct structural research and innovation on the cooling water pump to improve its conveying efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems pointed out in the background technique, and provide a brand-new structure engine cooling water pump for efficiently supplying and conveying coolant. A lining sleeve is arranged inside the pump housing, and the impeller body rotates in the lining sleeve and transports the coolant. The rubber blades of the impeller body are adaptively and elastically attached to the inner wall of the lining sleeve, greatly improving the conveying efficiency of the coolant.

[0004] The purpose of the utility model is realized by the following technical solutions:

[0005] An engine cooling water pump for efficiently supplying and conveying coolant, including a pump housing and a pump shaft located inside the pump housing. The pump housing has an impeller cavity inside, and a liquid inlet end and a liquid outlet end communicating with the impeller cavity are arranged outside the pump housing. An impeller body located in the impeller cavity is power-mounted on the pump shaft. A lining sleeve is fixed on the inner wall of the pump housing, and the impeller body is placed in the lining sleeve; the inner cavity of the lining sleeve is a gradually changing cavity, and the cavity of the gradually changing cavity gradually shrinks from the liquid inlet end to the liquid outlet end in the rotation direction of the impeller body. The impeller body has rubber blades distributed in a circumferential manner, and the end edges of all the rubber blades are attached to the barrel wall of the lining sleeve.

[0006] In order to better realize the utility model, the impeller body is composed of an impeller cylinder and rubber blades distributed in a circumferential manner outside the impeller cylinder; the barrel wall of the lining sleeve is composed of several arc surfaces, and the gradually changing cavity is formed between all the arc surfaces and the outer wall of the impeller cylinder.

[0007] Preferably, the barrel wall of the lining sleeve is composed of four arc surfaces, which are the first arc surface, the second arc surface, the third arc surface, and the fourth arc surface in sequence.

[0008] Preferably, the second arc surface corresponds to the liquid inlet end, and the fourth arc surface corresponds to the liquid outlet end; the included angle between the central axis of the liquid inlet end and the central axis of the liquid outlet end is 85-95 degrees.

[0009] Preferably, the third arc surface is the arc surface from the liquid inlet end to the liquid outlet end in the rotation direction of the impeller body.

[0010] Preferably, the first arc surface is the arc surface from the liquid outlet end to the liquid inlet end in the rotation direction of the impeller body, and the gradually changing cavity corresponding to the first arc surface gradually increases from the minimum cavity volume to the maximum cavity volume.

[0011] Preferably, a metal lining sleeve is fixed in the inner cavity of the impeller barrel of the impeller body, driving teeth are arranged in a circumferential distribution on the outside of the pump shaft, and driven teeth that are power-matched with the driving teeth are arranged in a circumferential distribution on the inner side wall of the metal lining sleeve.

[0012] Preferably, the inner cavity of the pump housing is divided into the impeller cavity and the motor shaft cavity by a partition plate, and a bearing corresponding to the pump shaft is installed in the motor shaft cavity.

[0013] Preferably, the lining sleeve is provided with a plurality of water inlet through holes communicating the liquid inlet end with the impeller cavity, and the lining sleeve is provided with a plurality of water outlet through holes communicating the liquid outlet end with the impeller cavity.

[0014] Preferably, the rubber blade is composed of a blade handle body and a spherical body located at the end of the blade handle body, and the cross-sectional area of the blade handle body gradually shrinks from the barrel wall of the impeller barrel to the spherical body.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] (1) In the present invention, a lining sleeve is provided inside the pump housing, the impeller body rotates in the lining sleeve and transports the coolant, and the rubber blades of the impeller body are adaptively elastically attached to the inner wall of the lining sleeve, greatly improving the conveying efficiency of the coolant.

[0017] (2) In the present invention, the inner cavity of the lining sleeve is a gradually changing cavity, so that the adjacent rubber blades of the impeller body expand to fully absorb the coolant at the liquid inlet end and contract and fully release and discharge the coolant at the liquid outlet end, further improving the conveying efficiency of the coolant.

[0018] (3) In the present invention, the rubber blades and the lining sleeve are both in elastic contact and are made of rubber materials. The inner wall of the lining sleeve will adhere to the coolant to play a lubricating role, and the dynamic friction between the rubber blades and the inner wall of the lining sleeve is small. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the internal structure of the present utility model;

[0020] Figure 2 is Figure 1 the A-A sectional view of

[0021] Figure 3 is Figure 1 the schematic diagram of the structure of the middle lining sleeve in

[0022] Figure 4 is the schematic diagram of the structure of the impeller body in the embodiment;

[0023] Figure 5 is the schematic diagram of the structure of the lining sleeve in the embodiment.

[0024] Among them, the names corresponding to the reference numerals in the drawings are as follows:

[0025] 1 - pump housing, 11 - liquid inlet end, 12 - liquid outlet end, 2 - lining sleeve, 21 - first arc surface, 22 - second arc surface, 23 - third arc surface, 24 - fourth arc surface, 3 - impeller body, 31 - rubber blade, 311 - blade handle body, 312 - spherical body, 4 - metal inner lining sleeve, 5 - pump shaft, 51 - pump shaft input end, 6 - tapered cavity, 61 - first blade movement cavity, 62 - second blade movement cavity, 63 - third blade movement cavity, 64 - fourth blade movement cavity, 7 - partition board, 8 - bearing. Specific embodiments

[0026] The present utility model will be further described in detail below in conjunction with the embodiments:

[0027] Embodiment

[0028] As Figures 1 to 5 shown, an engine cooling water pump for efficiently supplying and transporting coolant includes a pump housing 1 and a pump shaft 5 located inside the pump housing 1. The pump housing 1 has an impeller cavity inside. Preferably, the inner cavity of the pump housing 1 is separated into an impeller cavity and a motor shaft cavity by a partition board 7. In order to enhance the sealing effect between the impeller cavity and the motor shaft cavity, a grease seal structure or a water seal structure can be provided near the partition board 7 in the motor shaft cavity. A bearing 8 corresponding to the pump shaft 5 is installed in the motor shaft cavity. The present utility model adopts at least two bearings 8 to stably support and cooperate with the rotation of the pump shaft 5. The pump shaft 5 has a pump shaft input end 51 outside the pump housing 1, and the pump shaft input end 51 is used to install a driving motor.

[0029] The outside of the pump housing 1 is provided with a liquid inlet end 11 and a liquid outlet end 12 that communicate with the impeller chamber. The impeller body 3 is power-mounted on the pump shaft 5 and located in the impeller chamber. In some embodiments, a metal inner lining sleeve 4 is fixed in the inner cavity of the impeller cylinder of the impeller body 3. The outside of the pump shaft 5 is circumferentially provided with driving teeth, and the inner side wall of the metal inner lining sleeve 4 is circumferentially provided with driven teeth that are in power cooperation with the driving teeth. The driving motor drives the pump shaft 5 to rotate, and the pump shaft 5 drives the impeller body 3 to rotate through the power cooperation structure of the driving teeth and the driven teeth (see Figure 1 , the impeller body 3 rotates clockwise).

[0030] A lining sleeve 2 is fixed to the inner wall of the pump housing 1. Preferably, the pump housing 1 is provided with an embedding groove, and the lining sleeve 2 is integrally embedded and fixed in the pump housing 1. A number of concave-convex fitting and fixing structures can also be provided between the outside of the lining sleeve 2 and the inner wall of the pump housing 1; the lining sleeve 2 can also be installed in the inner wall of the pump housing 1 by using strong glue and interference fit (while corresponding limit blocks are provided at the liquid inlet end 11 or / and the liquid outlet end 12 of the pump housing 1). The impeller body 3 is placed in the lining sleeve 2; the inner cavity of the lining sleeve 2 is a gradually changing cavity 6, and the cavity of the gradually changing cavity 6 gradually shrinks from the liquid inlet end 11 to the liquid outlet end 12 in the rotation direction of the impeller body 3. The impeller body 3 has rubber blades 31 that are circumferentially distributed, and the end edges of all the rubber blades 31 are attached to the wall of the lining sleeve 2. Both the lining sleeve 2 and the rubber blades 31 are made of rubber material. The rubber blades 31 are elastically attached to the inner wall of the lining sleeve 2, and the rubber blades 31 are also in an elastic hook shape and can adaptively perform elastic cooperation. Some coolant will adhere to the inner wall of the lining sleeve 2 to play a lubricating role and further reduce the movement friction. As Figure 1 shown, the edges of the rubber blades 31 of the impeller body 3 are all attached to the wall of the lining sleeve 2, and the water between adjacent rubber blades 31 can be conveyed towards the liquid outlet end 12 in the rotation direction of the impeller body 3. The lining sleeve 2 is provided with a number of water inlet through holes that communicate the liquid inlet end 11 with the impeller chamber, and the lining sleeve 2 is provided with a number of water outlet through holes that communicate the liquid outlet end 12 with the impeller chamber.

[0031] As Figure 4 shown, the impeller body 3 consists of an impeller cylinder and rubber blades 31 that are circumferentially distributed outside the impeller cylinder. As Figure 1 shown, the wall of the lining sleeve 2 consists of several arc surfaces, and a gradually changing cavity 6 is formed between all the arc surfaces and the outer wall of the impeller cylinder.

[0032] In some preferred embodiments, as Figure 3As shown, the barrel wall of the lining sleeve 2 is composed of four arc surfaces, which are the first arc surface 21, the second arc surface 22, the third arc surface 23, and the fourth arc surface 24 in sequence. The second arc surface 22 corresponds to the liquid inlet end 11, and the fourth arc surface 24 corresponds to the liquid outlet end 12. The included angle between the central axis of the liquid inlet end 11 and the central axis of the liquid outlet end 12 is 85 to 95 degrees. The third arc surface 23 is the arc surface from the liquid inlet end 11 to the liquid outlet end 12 in the rotation direction of the impeller body 3 (as Figure 3 shown. If the arc surface of the barrel wall of the lining sleeve 2 is regarded as a circular arc surface, then the third arc surface 23 in the major arc). The first arc surface 21 is the arc surface from the liquid outlet end 12 to the liquid inlet end 11 in the rotation direction of the impeller body 3. The gradually changing cavity 6 corresponding to the first arc surface 21 gradually increases from the minimum cavity volume to the maximum cavity volume. The first arc surface 21, the second arc surface 22, the third arc surface 23, and the fourth arc surface 24 can adopt circular arc surfaces. For example: the radius of the first arc surface 21 is R1, the radius of the second arc surface 22 is R2, the radius of the third arc surface 23 is R3, and the radius of the fourth arc surface 24 is R4, where the radius R2 and the radius R4 can be equal, and the radius R1 is less than the radius R3.

[0033] Preferably, as Figure 3 shown, the gradually changing cavity 6 corresponding to the first arc surface 21 (within the fan-shaped area of the first blade motion cavity 61 in Figure 3 ) gradually increases from the minimum cavity volume to the maximum cavity volume (in this embodiment, the clockwise direction is taken as the rotation direction of the impeller body 3). The gradually changing cavity 6 corresponding to the third arc surface 23 (within the fan-shaped area of the third blade motion cavity 63 in Figure 3 ) maintains the maximum cavity volume (or the gradually changing cavity 6 corresponding to the third arc surface 23 gradually shrinks from the maximum cavity volume to the minimum cavity volume). The gradually changing cavity 6 corresponding to the second arc surface 22 (within the fan-shaped area of the second blade motion cavity 62 in Figure 3 ), and the fourth arc surface 24 (within the fan-shaped area of the fourth blade motion cavity 64 in Figure 3 ) both serve the purpose of smooth transition. After the impeller body 3 is installed inside Figure 3 , the gradually changing cavity 6, except for the impeller barrel of the impeller body 3, is successively composed of the first blade motion cavity 61, the second blade motion cavity 62, the third blade motion cavity 63, and the fourth blade motion cavity 64.

[0034] In some embodiments, the rubber blade 31 is composed of a blade shank body 311 and a spherical body 312 located at the end of the blade shank body 311. The cross-sectional area of the blade shank body 311 tapers from the wall of the impeller cylinder to the spherical body 312, that is, the blade shank body 311 becomes thinner from the root to the end (the end close to the spherical body 312). The thick root of the blade shank body 311 is beneficial to fixing with the outer wall of the impeller cylinder of the impeller body 3 and is not prone to cracks and damage; the thin end of the blade shank body 311 is beneficial to the adaptive deformation of the blade shank body 311.

[0035] When the pump shaft 5 is driven to rotate, the impeller body 3 is driven to rotate. The coolant enters the tapered cavity 6 (the coolant storage cavity of the pump body) from the liquid inlet end 11. Figure 1 For example, it is shown that the impeller body 3 rotates clockwise in the direction of the arrow. The coolant entering from the liquid inlet end 11 by two adjacent rubber blades 31 will be taken to the liquid outlet end 12 and discharged along with the rotational movement. Then the two adjacent rubber blades 31 are compressed when passing through the front end of the first blade movement cavity 61, which is beneficial to the complete discharge of the coolant; then the two adjacent rubber blades 31 gradually expand. When they return to the liquid inlet end 11 again, the two adjacent rubber blades 31 are fully expanded and reabsorb the coolant. The rubber blades 31 of the impeller body 3 and the lining sleeve 2 of the present utility model are both made of rubber materials. They are elastically fitted during the movement process, increasing the conveying efficiency of the coolant. The rubber blades 31 are in the shape of elastic hooks and can adapt to the spatial changes of the tapered cavity 6.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An engine cooling water pump for efficiently supplying and transporting coolant, comprising a pump housing (1) and a pump shaft (5) located inside the pump housing (1). The interior of the pump housing (1) has an impeller chamber, and a liquid inlet end (11) and a liquid outlet end (12) communicating with the impeller chamber are provided outside the pump housing (1), and it is characterized in that: An impeller body (3) located in the impeller cavity is dynamically installed on the pump shaft (5). A lining sleeve (2) is fixed to the inner wall of the pump housing (1), and the impeller body (3) is placed in the lining sleeve (2). The inner cavity of the lining sleeve (2) is a gradually changing cavity (6), and the cavity of the gradually changing cavity (6) gradually shrinks from the liquid inlet end (11) to the liquid outlet end (12) in the rotation direction of the impeller body (3). The impeller body (3) has rubber blades (31) distributed in a circle, and the end edges of all the rubber blades (31) are attached to the wall of the lining sleeve (2).

2. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 1, characterized in that: The impeller body (3) consists of an impeller cylinder and rubber blades (31) distributed in a circle outside the impeller cylinder. The wall of the lining sleeve (2) is composed of several arc surfaces, and the gradually changing cavity (6) is formed between all the arc surfaces and the outer wall of the impeller cylinder.

3. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 2, characterized in that: The wall of the lining sleeve (2) is composed of four arc surfaces, which are the first arc surface (21), the second arc surface (22), the third arc surface (23) and the fourth arc surface (24) in sequence.

4. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 3, characterized in that: The second arc surface (22) corresponds to the liquid inlet end (11), and the fourth arc surface (24) corresponds to the liquid outlet end (12). The included angle between the central axis of the liquid inlet end (11) and the central axis of the liquid outlet end (12) is 85 - 95 degrees.

5. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 4, characterized in that: The third arc surface (23) is an arc surface from the liquid inlet end (11) to the liquid outlet end (12) in the rotation direction of the impeller body (3).

6. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 5, characterized in that: The first arc surface (21) is an arc surface from the liquid outlet end (12) to the liquid inlet end (11) in the rotation direction of the impeller body (3), and the gradually changing cavity (6) corresponding to the first arc surface (21) gradually increases from the minimum cavity volume to the maximum cavity volume.

7. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 2, characterized in that: A metal inner lining sleeve (4) is fixed to the inner cavity of the impeller cylinder of the impeller body (3). Driving teeth are distributed in a circle outside the pump shaft (5), and driven teeth that are in power cooperation with the driving teeth are distributed in a circle on the inner side wall of the metal inner lining sleeve (4).

8. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 1, characterized in that: The inner cavity of the pump housing (1) is separated into the impeller cavity and the motor shaft cavity by a partition (7), and a bearing (8) corresponding to the pump shaft (5) is installed in the motor shaft cavity.

9. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 1, characterized in that: The lining sleeve (2) is provided with a number of water inlet through holes connecting the liquid inlet end (11) and the impeller cavity, and the lining sleeve (2) is provided with a number of water outlet through holes connecting the liquid outlet end (12) and the impeller cavity.

10. An engine cooling water pump for efficiently supplying and conveying coolant according to claim 2, characterized in that: The rubber blade (31) consists of a blade handle body (311) and a spherical body (312) located at the end of the blade handle body (311), and the cross-sectional area of the blade handle body (311) gradually shrinks from the wall of the impeller cylinder to the spherical body (312).

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