Diesel engine power water pump unit

Abstract

The diesel engine power water pump unit comprises a unit base, a water pump assembly and a diesel engine, the water pump assembly comprises a pump body, an impeller arranged in the pump body, a pump shaft for installing the impeller and a pump cover installed on the pump body, and the pump body and the diesel engine are both installed on the unit base; the pump body is connected with the diesel engine through a direct connecting frame. The pump cover on the pump body and the front end cover of the diesel engine are positioned and matched together through the direct connection frame to form rigid connection, the relative position difference between the water pump assembly and the diesel engine can be effectively reduced, and then the pump shaft is rotationally installed in the direct connection cavity and matched with the output shaft of the diesel engine. The concentricity between the pump shaft and the output shaft of the diesel engine can be effectively guaranteed, the gap between the pump shaft and a non-rotating part, the installation precision of a mechanical seal and the like are guaranteed, and the service life and stability of a unit during working are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece concentricity measuring devices, in particular to a diesel engine powered water pump unit. Background Art

[0002] The diesel engine powered water pump unit is driven by a diesel engine and can be used in places without power supply. Therefore, it is widely used in urban waterlogging drainage, construction site water supply and drainage, and emergency rescue. Referring to the Chinese patent publication (announcement) number CN203783908U, the existing diesel engine powered water pump unit usually includes a pump body and a diesel engine installed on a pump base. The pump body is provided with an impeller disk, and the impeller disk is connected to the output shaft of the diesel engine through a pump shaft. When working, the diesel engine outputs power and drives the impeller disk to rotate through the pump shaft to realize liquid transportation.

[0003] However, in the prior art, although the pump body and the diesel engine are fixed on the same pump base, the relative positioning between the pump body and the diesel engine can be achieved, but this connection method only achieves the positioning between the lower part of the pump body and the lower part of the diesel engine. There is no rigid connection structure between the upper part of the pump body and the upper part of the diesel engine to achieve positioning. A relative position difference is easily present between the upper part of the pump body and the upper part of the diesel engine, resulting in low coaxiality between the output shaft of the diesel engine and the pump shaft after connection with a coupling, thereby affecting the clearance between the pump shaft and non-rotating parts, the installation accuracy of the mechanical seal, etc., and greatly reducing the service life and stability during operation. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a diesel engine powered water pump unit.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A diesel engine powered water pump unit, comprising a unit base, a water pump assembly and a diesel engine, wherein the water pump assembly comprises a pump body, an impeller arranged in the pump body, a pump shaft on which the impeller is mounted, and a pump cover mounted on the pump body, wherein the pump body and the diesel engine are both mounted on the unit base; the characteristics are as follows:

[0007] A direct connection frame is provided between the pump body and the diesel engine, and a first connecting plate and a second connecting plate are respectively provided at both ends of the direct connection frame. The first connecting plate is connected to the pump body, and a first positioning cavity is provided on the first connecting plate, and a first positioning portion is provided on the pump cover and is positioned and matched in the first positioning cavity; the second connecting plate is fixedly connected to the front end cover of the diesel engine, and a second positioning cavity is provided on the second connecting plate, and a second positioning portion is provided on the front end cover of the diesel engine and is positioned and matched in the second positioning cavity. The pump shaft is rotatably installed in the connecting cavity of the direct connection frame, and the two ends of the pump shaft are respectively connected to the impeller and the output shaft of the diesel engine.

[0008] In the utility model, the pump shaft includes a main body section, a driving section and a transmission section respectively arranged at both ends of the main body section. The main body section is rotatably installed in the connecting cavity through two rotating bearings, and one end of the driving section extends into the pump body through the through hole of the pump cover and is fixedly connected to the impeller; the transmission section is installed with a coupling for transmission connection with the output shaft of the diesel engine in the connecting cavity.

[0009] In the utility model, two bearing seats are provided in the connecting cavity, the bearing seats are fixedly connected to the direct-connecting frame, each bearing seat is correspondingly installed with a rotating bearing, a bearing groove is provided on the bearing seat, the rotating bearing is installed in the bearing groove, and a bearing cover is installed on the bearing seat to limit the rotating bearing in the bearing groove.

[0010] In the utility model, the outer peripheries of the two bearing seats are connected to the cavity wall of the connecting cavity, and the cavity wall between the two bearing seats and the cavity wall of the connecting cavity constitute a lubrication cavity for containing lubricating oil.

[0011] In the utility model, both ends of the main body section are provided with a first step position matching the inner ring of the rotating bearing and a second step position passing through the central through hole; a first step position close to the transmission section is provided with a bearing locking threaded section, and a round nut is threadedly sleeved on the bearing locking threaded section, and the round nut is used to lock the rotating bearing close to the transmission section.

[0012] In the utility model, the driving section is provided with a third step position, and the impeller is mounted on the third step position; the third step position is provided with an impeller locking thread section, and the impeller locking thread section is threaded with an impeller nut that locks the impeller on the third step position.

[0013] In the utility model, a mechanical seal is provided between the impeller and the pump cover to prevent liquid from passing through the through hole.

[0014] In the utility model, a first matching cavity is provided at one end of the pump cover close to the impeller, a second matching cavity is provided in the pump body, a first convex ring portion which is inserted into the first matching cavity and a second convex ring portion which is inserted into the second matching cavity are provided on the impeller, a first sealing ring is provided between the first convex ring portion and the first matching cavity, and a second sealing ring is provided between the second convex ring portion and the second matching cavity.

[0015] In the utility model, a drain hole for discharging the liquid inside the pump body is provided at the lower end of the pump body, and the drain hole is threadedly matched with a plug for sealing.

[0016] In the utility model, the driving section is provided with a liquid retaining ring located in the direct connection cavity, and the bottom of the direct connection frame is provided with a drainage port corresponding to the bottom of the liquid retaining ring.

[0017] The beneficial effects of the utility model are as follows: the utility model first positions and matches the pump cover on the pump body with the front end cover of the diesel engine through a direct connection frame to form a rigid connection, which can effectively reduce the relative position difference between the water pump assembly and the diesel engine, and then rotatably installs the pump shaft in the direct connection cavity and cooperates with the output shaft of the diesel engine, which can effectively ensure the concentricity between the pump shaft and the output shaft of the diesel engine, ensure the gap between the pump shaft and non-rotating parts, the installation accuracy of the mechanical seal, etc., and improve the service life and stability of the unit during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a structural schematic diagram of this embodiment;

[0020] Figure 2 for Figure 1 A magnified view of middle;

[0021] Figure 3 for Figure 1 Enlarged view of middle B;

[0022] Figure 4 It is a schematic diagram of the combination of the water pump assembly and the direct-connection frame;

[0023] Figure 5 This is a schematic diagram of the interior of the direct-connection frame. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0025] Reference Figure 1-5 A diesel engine powered water pump unit comprises a unit base 1, a water pump assembly and a diesel engine 2. The water pump assembly comprises a pump body 3 having a water outlet, a water inlet and a mounting port, an impeller 4 arranged in the pump body 3, a pump shaft 5 for mounting the impeller 4, and a pump cover 6 for closing the mounting port. The pump body 3 and the diesel engine 2 are both mounted on the unit base 1. The water outlet, the water inlet and the mounting port are all connected to the interior of the pump body 3. The pump cover 6 is mounted on the pump body 3 by connecting bolts. An O-ring 20 is provided between the pump cover 6 and the pump body 3 for sealing.

[0026] Furthermore, a direct connection frame 7 is provided between the pump body 3 and the diesel engine 2, and a first connection plate 71 and a second connection plate 72 are provided at both ends of the direct connection frame 7, respectively. The first connection plate 71 is connected to the pump body 3 by a second bolt, and a first positioning cavity 711 is provided on the first connection plate 71, and a first positioning portion 60 is provided on the pump cover 6 for positioning and matching in the first positioning cavity 711; the second connection plate 72 is fixedly connected to the front end cover of the diesel engine 2 by a second bolt, and a second positioning cavity 721 is provided on the second connection plate 72, and a second positioning portion 21 is provided on the front end cover of the diesel engine 2 for positioning and matching in the second positioning cavity 721. The above structure can effectively reduce the relative position difference between the water pump assembly and the diesel engine 2 by utilizing the cooperation between the first positioning cavity 711 and the first positioning portion 60, and between the second positioning cavity 721 and the second positioning portion 21.

[0027] Furthermore, the interior of the direct-connection frame 7 is a connection cavity, and the pump shaft 5 is rotatably mounted in the connection cavity of the direct-connection frame 7, and the two ends of the pump shaft 5 are respectively connected to the impeller 4 and the output shaft of the diesel engine 2. Specifically, the pump shaft 5 includes a main body section 51, a drive section 52 and a transmission section 53 which are respectively integrally formed on the two ends of the main body section 51, and the main body section 51 is rotatably mounted in the connection cavity through two rotating bearings 8, and one end of the drive section 52 passes through the through hole of the pump cover 6 and extends into the pump body 3 to be fixedly connected to the impeller 4; the transmission section 53 is installed with a coupling 9 for driving connection with the output shaft of the diesel engine 2 in the connection cavity.

[0028] In the above structure, the direct-connecting frame 7 first positions and fits the pump cover 6 on the pump body 3 with the front end cover of the diesel engine 2 to form a rigid connection, which can effectively reduce the relative position difference between the water pump assembly and the diesel engine 2, and then fits the pump shaft 5 with the output shaft of the diesel engine 2 in the direct-connecting cavity, which can effectively ensure the concentricity between the pump shaft 5 and the output shaft of the diesel engine 2, ensure the clearance between the pump shaft 5 and non-rotating parts, the installation accuracy of the mechanical seal 11, etc., and improve the life and stability of the unit during operation.

[0029] As a preferred embodiment, two bearing seats 73 are provided in the connecting cavity, and the bearing seats 73 are fixedly connected to the direct-connecting frame 7. Each of the bearing seats 73 is correspondingly installed with a rotating bearing 8. The bearing seats 73 are provided with bearing grooves, and the rotating bearing 8 is installed in the bearing grooves. The bearing seats 73 are installed with bearing caps 74 that limit the rotating bearing 8 in the bearing grooves. The two ends of the main section 51 pass through the central through holes of the two bearing caps 74 respectively, so that the driving section 52 and the transmission section 53 cooperate with the corresponding components. Further, the outer peripheries of the two bearing seats 73 are connected to the cavity wall of the connecting cavity, and the two bearing seats 73 and the cavity wall of the connecting cavity form a lubrication cavity for containing lubricating oil. The lubricating oil provided in the lubrication cavity can lubricate the two rotating bearings 8 to ensure the rotation quality of the rotating bearing 8. Furthermore, at least one of the bearing caps 74 is provided with an oiling nozzle for oiling, so as to add lubricating oil. The lubricating oil is injected from the oiling nozzle, and the lubricating oil can pass between the inner ring and the outer ring of the rotating bearing 8 and enter the lubricating cavity, so that the lubricating oil can be injected into the oiling nozzle of one bearing seat 73, and the lubricating oil flows to the other rotating bearing 8 in the lubricating cavity, so that the two rotating bearings 8 can be lubricated. Furthermore, an oil seal 16 is provided between the central through hole of the bearing cap 74 and the main body section 51 for sealing to reduce the probability of lubricating oil leakage.

[0030] As a preferred embodiment, the direct-connecting frame 7 is in the shape of a circular tube, and is provided with a first window 75 which is offset from the lubrication cavity and corresponds to the position of the coupling 9, and a second window 76 which is offset from the lubrication cavity and corresponds to the position of the bearing cover 74. The first window 75 and the second window 76 are used to facilitate the later maintenance and repair of the components located in the connecting cavity.

[0031] As a preferred embodiment, both ends of the main section 51 are provided with a first step position matching the inner ring of the rotating bearing 8 and a second step position passing through the center through hole, the diameter of the second step position is smaller than the diameter of the first step position, and the diameter of the first step position is smaller than the diameter of the main section 51.

[0032] As a preferred embodiment, in order to facilitate the installation of the two bearings and the pump shaft 5 in the connecting cavity, a bearing locking threaded section is provided at a first step position near the transmission section 53, and a round nut 77 is threadedly sleeved on the bearing locking threaded section. The round nut 77 is used to lock the rotating bearing 8 near the transmission section 53. During installation, the rotating bearing 8 near the transmission section 53 can be first sleeved on the corresponding first step position, and then locked with the round nut 77; then the pump shaft 5 is passed through the shaft seat holes in the two bearing seats 73, so that the rotating bearing 8 near the transmission section 53 is fitted in the corresponding bearing groove, and then locked with the corresponding bearing cover 74. By first locking the rotating bearing 8 with the round nut 77, the rotating bearing 8 can be prevented from shifting when it is fitted in the corresponding bearing groove, thereby ensuring the installation quality; then the other rotating bearing 8 is installed in the connecting cavity on the first step position near the drive section 52, and then locked with the corresponding bearing cover 74.

[0033] As a preferred embodiment, a third step is provided on the driving section 52, and the impeller 4 is installed on the third step. The third step is provided with a flat key 9 that cooperates with the impeller 4 and makes the impeller 4 rotate synchronously with the pump shaft 5; the third step is provided with an impeller locking thread section, and the impeller locking thread section is threaded with an impeller nut 10 that locks the impeller 4 on the third step, and an impeller gasket is provided between the impeller 4 and the impeller nut 10 to improve the locking quality.

[0034] As a preferred embodiment, a mechanical seal 11 is provided between the impeller 4 and the pump cover 6 to prevent liquid from passing through the through hole, thereby ensuring the sealing effect of the water pump assembly. In this embodiment, the pump cover 6 is provided with an end groove axially connected to the through hole, one end of the mechanical seal 11 is positioned and matched in the end groove, and the other end is matched on the impeller 4. The end groove is matched with the mechanical seal 11, so that the installation quality of the mechanical seal 11 can be improved.

[0035] As a preferred embodiment, in order to further improve the sealing quality of the water pump assembly, a first matching cavity is provided at one end of the pump cover 6 close to the impeller 4, a second matching cavity is provided in the pump body 3, and a first convex ring portion which is inserted into the first matching cavity and a second convex ring portion which is inserted into the second matching cavity are provided on the impeller 4. A first sealing ring 12 is provided between the first convex ring portion and the first matching cavity, and a second sealing ring 13 is provided between the second convex ring portion and the second matching cavity.

[0036] As a preferred embodiment, the lower end of the pump body 3 is provided with a drain hole for discharging the liquid inside the pump body 3, and the drain hole is threadedly fitted with a plug 14 for closing. When the water pump assembly is working normally, the plug 14 closes the drain hole to prevent the liquid from leaking out of the drain hole; when the water pump assembly is abnormal or requires maintenance, the plug 14 can be removed to drain the liquid in the pump body 3, and then the parts inside the pump body 3 can be maintained and repaired.

[0037] As a preferred embodiment, the driving section 52 is provided with a liquid-blocking ring 15 located in the direct connection cavity, and the liquid-blocking ring 15 is an elastic rubber ring. The bottom of the direct connection frame 7 is provided with a drain port 78 corresponding to the bottom of the liquid-blocking ring 15; when the liquid seeping out from the central through hole position flows along the driving section 52 to the liquid-blocking ring 15, the liquid is blocked by the liquid-blocking ring 15 and drips from the bottom of the liquid-blocking ring 15 into the connection cavity, and then is discharged from the drain port 78, so as to avoid the liquid dripping from the liquid-blocking ring 15 from accumulating in the connection cavity.

[0038] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. A diesel engine powered water pump unit, comprising a unit base (1), a water pump assembly and a diesel engine (2), wherein the water pump assembly comprises a pump body (3), an impeller (4) disposed in the pump body (3), a pump shaft (5) on which the impeller (4) is mounted, and a pump cover (6) mounted on the pump body (3), wherein the pump body (3) and the diesel engine (2) are both mounted on the unit base (1); Features: A direct connection frame (7) is provided between the pump body (3) and the diesel engine (2), and a first connection plate (71) and a second connection plate (72) are provided at both ends of the direct connection frame (7), respectively; the first connection plate (71) is connected to the pump body (3), and a first positioning cavity (711) is provided on the first connection plate (71), and a first positioning portion (60) is provided on the pump cover (6) and is positioned and matched in the first positioning cavity (711); the second connection plate (72) is fixedly connected to the front end cover of the diesel engine (2), and a second positioning cavity (721) is provided on the second connection plate (72), and a second positioning portion (21) is provided on the front end cover of the diesel engine (2), and the pump shaft (5) is rotatably mounted in the connection cavity of the direct connection frame (7), and the two ends of the pump shaft (5) are respectively connected to the impeller (4) and the output shaft of the diesel engine (2).

2. The diesel engine powered water pump unit according to claim 1, Features: The pump shaft (5) comprises a main body section (51), a driving section (52) and a transmission section (53) respectively arranged at both ends of the main body section (51); the main body section (51) is rotatably mounted in the connecting cavity via two rotating bearings (8); one end of the driving section (52) passes through a through hole of a pump cover (6) and extends into the pump body (3) to be fixedly connected to the impeller (4); and a coupling (9) for drivingly connecting to an output shaft of a diesel engine (2) in the connecting cavity is mounted on the transmission section (53).

3. The diesel engine powered water pump unit according to claim 2, Features: Two bearing seats (73) are provided in the connection cavity. The bearing seats (73) are fixedly connected to the direct-connection frame (7). Each of the bearing seats (73) is correspondingly mounted with one of the rotary bearings (8). The bearing seats (73) are provided with a bearing groove. The rotary bearing (8) is mounted in the bearing groove. The bearing seats (73) are mounted with a bearing cover (74) for restricting the rotary bearing (8) in the bearing groove.

4. The diesel engine powered water pump unit according to claim 3, Features: The outer peripheries of the two bearing seats (73) are connected to the cavity wall of the connecting cavity, and the two bearing seats (73) and the cavity wall of the connecting cavity form a lubrication cavity for containing lubricating oil.

5. The diesel engine powered water pump unit according to claim 3, Features: Both ends of the main body section (51) are provided with a first step position matching the inner ring of the rotary bearing (8) and a second step position passing through the central through hole; a first step position close to the transmission section (53) is provided with a bearing locking threaded section, a round nut (77) is threadedly sleeved on the bearing locking threaded section, and the round nut (77) is used to lock the rotary bearing (8) close to the transmission section (53).

6. The diesel engine powered water pump unit according to claim 2, Features: The driving section (52) is provided with a third step position, and the impeller (4) is mounted on the third step position; the third step position is provided with an impeller locking thread section, and the impeller locking thread section is threadedly matched with an impeller nut (10) for locking the impeller (4) on the third step position.

7. The diesel engine powered water pump unit according to claim 1, Features: A mechanical seal (11) is provided between the impeller (4) and the pump cover (6) for preventing liquid from passing through the through hole.

8. The diesel engine powered water pump unit according to claim 1, Features: The pump cover (6) is provided with a first matching cavity at one end close to the impeller (4), the pump body (3) is provided with a second matching cavity, the impeller (4) is provided with a first convex ring portion which is inserted into the first matching cavity and a second convex ring portion which is inserted into the second matching cavity, a first sealing ring (12) is provided between the first convex ring portion and the first matching cavity, and a second sealing ring (13) is provided between the second convex ring portion and the second matching cavity.

9. The diesel engine powered water pump unit according to claim 1, Features: The lower end of the pump body (3) is provided with a drainage hole for discharging liquid inside the pump body (3), and the drainage hole is threadedly fitted with a plug (14) for sealing.

10. The diesel engine powered water pump unit according to claim 2, Features: The driving section (52) is provided with a liquid retaining ring (15) located in the direct connection cavity, and the bottom of the direct connection frame (7) is provided with a drainage port (78) corresponding to the bottom of the liquid retaining ring (15).

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