Compact serial pump

Abstract

The utility model discloses a compact tandem pump which comprises a gear shaft (21), a front cover (22), a front pump body (23), a transition plate (24), a rear pump body (25) and a rear cover (26), the front pump body (23) and the rear pump body (25) are respectively provided with an oil inlet and an oil outlet, the gear shaft (21) is provided with a gear, the front cover (22), the front pump body (23), the transition plate (24), the rear pump body (25) and the rear cover (26) are fixedly connected through a plurality of screws, the head end of the gear shaft (21) penetrates through the front cover (22), and the tail end of the gear shaft (21) penetrates through the rear cover (26). The middle of the gear shaft (21) penetrates through the transition plate (24), and a gear of the gear shaft (21) is arranged in the front pump body (23). Therefore, on one hand, the overall length of the pump is greatly shortened, the design is compact, the installation space is saved, on the other hand, two-in and two-out effects are achieved, the good oil supply self-suction capacity is achieved, and the phenomena of oil grabbing and even pump burning during high-speed operation are avoided.

Description

Technical Field

[0001] The utility model relates to the field of mechanical engineering, and particularly relates to a compact series pump. Background Art

[0002] The traditional design of a duplex pump usually consists of two single pumps connected in series through an intermediate body (as shown in Figure 1 ), although this design can meet the basic functional requirements and achieve a fluid distribution mode of "one inlet and two outlets" or "two inlets and two outlets", there are certain limitations in practical applications. Especially under high-speed operation conditions, for a duplex pump with a "one inlet and two outlets" structure, it is easy to have a situation where the front and rear pumps compete for oil suction, resulting in insufficient oil supply to the pump body with a weaker self-priming ability. In severe cases, it may even cause overheating and damage of the pump body, that is, the so-called "pump burning" phenomenon. In addition, the traditional duplex pump has a bulky structure, with relatively large volume and dimensions, and will occupy a large installation space during installation. Summary of the Utility Model

[0003] The utility model aims to at least partly solve one of the technical problems in the above technologies.

[0004] For this reason, an object of the present utility model is to provide a compact series pump, which on the one hand greatly shortens the overall length of the pump, has a compact design and saves installation space, and on the other hand realizes two inlets and two outlets, has a better oil supply self-priming ability, and avoids the phenomenon of oil robbing or even pump burning during high-speed operation.

[0005] To achieve the above object, a compact series pump according to the first aspect embodiment of the present utility model includes: a gear shaft, a front cover, a front pump body, a transition plate, a rear pump body, and a rear cover. Both the front pump body and the rear pump body are provided with an oil inlet and an oil outlet, and the gear shaft is provided with gears.

[0006] The front cover, the front pump body, the transition plate, the rear pump body, and the rear cover are fixedly connected by a plurality of screws. The first end of the gear shaft penetrates the front cover, the middle part of the gear shaft penetrates the transition plate, and the gears of the gear shaft are arranged in the front pump body.

[0007] The compact series pump according to the embodiment of the present utility model, on the one hand, greatly shortens the overall length of the pump, has a compact design and saves installation space, and on the other hand realizes two inlets and two outlets, has a better oil supply self-priming ability, and avoids the phenomenon of oil robbing or even pump burning during high-speed operation.

[0008] In addition, the compact series pump according to the above embodiment of the present utility model may further have the following additional technical features:

[0009] In one embodiment of the present utility model, flanges extending outward are provided on both surfaces of the transition plate, and the front pump body and the rear pump body are connected through the flanges on both surfaces of the transition plate.

[0010] In one embodiment of the present utility model, the flange is provided with a diversion groove.

[0011] In one embodiment of the present utility model, sliding bearings are respectively provided in the through holes of the front cover and the transition plate through which the gear shaft passes.

[0012] In one embodiment of the present utility model, a flange surface is provided on the front cover.

[0013] In one embodiment of the present utility model, a flat key is provided on the gear shaft.

[0014] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0015] The above-mentioned and / or additional aspects and advantages of the present utility model will become apparent and be easily understood from the following description of the embodiments in conjunction with the drawings, wherein:

[0016] Figure 1 is a structural schematic diagram of a double pump in the prior art;

[0017] Figure 2 is a structural schematic diagram of a compact series pump according to an embodiment of the present utility model Figure 1 ;

[0018] Figure 3 is a structural schematic diagram of a compact series pump according to an embodiment of the present utility model Figure 2 ;

[0019] As shown in the figure:

[0020] 11 - front cover, 12 - front pump body, 13 - rear cover of the front pump, 14 - intermediate body, 15 - rear pump body, 16 - rear cover.

[0021] 21 - gear shaft, 22 - front cover, 23 - front pump body, 24 - transition plate, 25 - rear pump body, 26 - rear cover, 27 - flange, 28 - flat key. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] The compact series pump of the embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0024] As Figure 1 shown, the existing double-pump is assembled by a front cover 11, a front pump body 12, a rear cover of the front pump 13, an intermediate body 14, a rear pump body 15 and a rear cover 16. The main body of the double-pump in the internal gear pump is that the front pump body 12 and the rear pump body 15 are connected through the rear cover of the front pump 13 and the intermediate body 14, and its overall length reaches 345 millimeters.

[0025] As Figure 2 and Figure 3 shown, a compact series pump disclosed by the present utility model includes: a gear shaft 21, a front cover 22, a front pump body 23, a transition plate 24, a rear pump body 25 and a rear cover 26. Both the front pump body 23 and the rear pump body 25 are provided with an oil inlet and an oil outlet, and the gear shaft 21 is provided with gears;

[0026] The front cover 22, the front pump body 23, the transition plate 24, the rear pump body 25 and the rear cover 26 are fixedly connected by a plurality of screws. The first end of the gear shaft 21 penetrates through the front cover 22, the middle part of the gear shaft 21 penetrates through the transition plate 24, and the gears of the gear shaft 21 are arranged inside the front pump body 23.

[0027] Both surfaces of the transition plate 24 are provided with flanges 27 extending outwards. The front pump body 23 and the rear pump body 25 are connected through the flanges 27 on both surfaces of the transition plate 24.

[0028] The flange 27 is provided with a diversion groove.

[0029] Sliding bearings are respectively arranged in the through holes of the gear shaft 21 penetrating through the front cover 22 and in the through holes of the gear shaft 21 penetrating through the transition plate 24.

[0030] The front cover 22 is provided with a flange surface.

[0031] A flat key 28 is arranged on the gear shaft 21.

[0032] Specifically, the displacement of the front pump body 23 is 63, the displacement of the rear pump body 25 is 32, and the length from the installation end surface of the front cover 22 to the rear cover 26 is 245 millimeters. Compared with the existing double-pump, its overall length is shortened by 100 millimeters.

[0033] In specific industrial equipment, such as excavators, loaders and large hydraulic machinery, the transition plate 24 ensures the precise cooperation between the front pump body 23 and the rear pump body 25. The front pump body 23 and the rear pump body 25 of this compact series pump are respectively connected to the oil pipelines of construction machinery.

[0034] At startup, the core components of the double pump start to operate. The front pump body 23 and the rear pump body 25 are pressurized independently. The front pump body 23 and the rear pump body 25 respectively suck hydraulic oil from independent inlets and implement an oil circuit with two inlets and two outlets, sending the oil to the designated actuators.

[0035] In summary, for the compact series pump according to the embodiment of the present invention, on the one hand, the overall length of the pump is greatly shortened, the design is compact and the installation space is saved. On the other hand, the two-in-two-out structure is realized, which has a better self-priming ability for oil supply and avoids the phenomenon of oil robbing or even pump burning during high-speed operation.

[0036] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A compact string pump, characterized in that, Comprising: A gear shaft (21), a front cover (22), a front pump body (23), a transition plate (24), a rear pump body (25) and a rear cover (26). The front pump body (23) and the rear pump body (25) are both provided with an oil inlet and an oil outlet, and the gear shaft (21) is provided with gears; The front cover (22), the front pump body (23), the transition plate (24), the rear pump body (25) and the rear cover (26) are fixedly connected by a plurality of screws. The first end of the gear shaft (21) penetrates through the front cover (22), the middle part of the gear shaft (21) penetrates through the transition plate (24), and the gears of the gear shaft (21) are arranged in the front pump body (23).

2. The compact string pump according to claim 1, wherein Two faces of the transition plate (24) are both provided with flanges (27) extending outwards, and the front pump body (23) and the rear pump body (25) are connected by the flanges (27) on the two faces of the transition plate (24).

3. The compact string pump according to claim 2, wherein, The flange (27) is provided with a diversion groove.

4. The compact string pump according to claim 1, characterized in that, Sliding bearings are respectively arranged in the through holes of the front cover (22) and the transition plate (24) through which the gear shaft (21) penetrates.

5. The compact string pump according to claim 1, characterized in that, The front cover (22) is provided with a flange surface.

6. The compact string pump according to claim 1, characterized in that, A flat key (28) is arranged on the gear shaft (21).

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