CN218118028U - Nuclear power dual gear pump - Google Patents

Abstract

The utility model discloses a nuclear power duplex gear pump, it includes first pump and the second pump that the axial is mutually supported, first pump includes the first pump body, first gear shaft subassembly includes intermeshing's first driving shaft and first driven shaft, this second pump includes the second pump body, second gear shaft subassembly includes intermeshing's second driving shaft and second driven shaft, this first driving shaft is equipped with first U type block portion towards the one end of second driving shaft, this second driving shaft is equipped with second U type block portion towards the one end of first driving shaft, this first U type block portion is in order to form cross key with the mutual block of second U type block portion, cross key periphery cover is equipped with the cross key cover. The nuclear power duplex gear pump reduces stress by enlarging the contact area of the cross key and the cross key sleeve, so that the service life of the cross key is prolonged, and the integral service life of the nuclear power duplex gear pump is prolonged.

Description

Nuclear power dual gear pump

Technical Field

The utility model relates to a nuclear power oil pump field especially relates to a nuclear power duplicate gear pump.

Background

The oil pump is the power element of the hydraulic system, and when one hydraulic system only has one prime mover and needs two hydraulic outputs, a plurality of designers can preferentially adopt the duplex pump. The double pump is formed by two single-stage gear pumps which are arranged in a pump body and are connected in parallel on an oil circuit. Rotors of the two gear pumps are driven to rotate by the same transmission shaft and have independent oil outlets, and the double pump is characterized in that only one driving shaft is needed for driving, but two flows can be output. The two flows can be used separately or in combination.

In the related technical scheme, as shown in fig. 1, the end parts of the driving shafts of the two gear pumps are all installed on the cross key sleeve, the contact area between the end parts of the driving shafts of the two gear pumps and the cross key sleeve is small, so that the contact stress is large, the end parts of the driving shafts of the two gear pumps are easy to collide and wear and damage, and meanwhile, the operation environment in a hydraulic system can be continuously changed, so that the abrasion of the cross key sleeve is large, the working stability of the dual pump is influenced, and the production cost is improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in that, a modified nuclear power double gear pump is provided.

The utility model provides a technical scheme that its technical problem adopted is: the nuclear power duplex gear pump is constructed and comprises a first pump and a second pump which are axially matched with each other, wherein the first pump comprises a first pump body and a first gear shaft assembly arranged in the first pump body, and the first gear shaft assembly comprises a first driving shaft and a first driven shaft which are mutually meshed;

the second pump comprises a second pump body and a second gear shaft assembly arranged in the second pump body, and the second gear shaft assembly comprises a second driving shaft and a second driven shaft which are meshed with each other;

one end of the first driving shaft, which faces the second driving shaft, is provided with a first U-shaped clamping part;

one end of the second driving shaft, which faces the first driving shaft, is provided with a second U-shaped clamping part;

the first U-shaped clamping part and the second U-shaped clamping part are clamped with each other to form a cross key, and a cross key sleeve is sleeved on the periphery of the cross key.

In some embodiments, the first U-shaped engaging portion is a plate-shaped structure, and a first through U-shaped groove is formed at one end of the first U-shaped engaging portion facing the second driving shaft;

the second U-shaped clamping part is of a plate-shaped structure, and a through second U-shaped groove is formed in one end, facing the first driving shaft, of the second U-shaped clamping part.

In some embodiments, the length of the first U-shaped clamping part is 19-20mm, and the length of the first U-shaped groove is half of the whole length of the first U-shaped clamping part;

the length of the second U-shaped clamping part is 19-20mm, and the length of the second U-shaped groove is half of the whole length of the second U-shaped clamping part;

the axial length of the cross key sleeve is 19-20mm.

In some embodiments, the first pump further comprises a first front end cap and a first rear end cap provided at both ends of the first pump body, the second pump further comprises a second front end cap and a second rear end cap provided at both ends of the second pump body, and the first rear end cap is disposed toward the second front end cap;

and one side of the second front end cover, which faces the first rear end cover, is provided with a containing groove for containing the cross key and the cross key sleeve.

In some embodiments, the first pump body, the first front end cap, and the first rear end cap are removably connected;

the second pump body, the second front end cover and the second rear end cover are detachably connected.

In some embodiments, a first seal ring is disposed between the first front end cover and the first pump body, and a second seal ring is disposed between the first pump body and the first rear end cover;

and a third sealing ring is arranged between the second front end cover and the second pump body, and a fourth sealing ring is arranged between the second pump body and the second rear end cover.

In some embodiments, a fifth seal ring is disposed between the first back end cap and the second front end cap.

In some embodiments, a first liquid inlet and a first liquid outlet are provided on opposite sides of the first pump body;

the first liquid inlet and the first liquid outlet face to the meshing position of the first driving shaft and the first driven shaft.

In some embodiments, a second liquid inlet and a second liquid outlet are arranged on opposite sides of the second pump body;

the second liquid inlet and the second liquid outlet are both towards the meshing position of the second driving shaft and the second driven shaft.

In some embodiments, the spider collar is a metal piece.

Implement the utility model discloses following beneficial effect has: the nuclear power dual gear pump comprises a first pump body and a second pump body which are matched with each other in the axial direction, the first pump body comprises a first pump body, a first gear shaft assembly arranged in the first pump body, the first gear shaft assembly comprises a first driving shaft and a first driven shaft which are meshed with each other, the second pump body comprises a second pump body, a second gear shaft assembly arranged in the second pump body, the second gear shaft assembly comprises a second driving shaft and a second driven shaft which are meshed with each other, one end, facing the second driving shaft, of the first driving shaft is provided with a first U-shaped clamping portion, one end, facing the first driving shaft, of the second driving shaft is provided with a second U-shaped clamping portion, the first U-shaped clamping portion and the second U-shaped clamping portion are clamped with each other to form a cross key, and a cross key sleeve is sleeved on the periphery of the cross key. According to the nuclear power duplicate gear pump, the cross key is redesigned and processed according to the existing size of the prokaryotic power duplicate gear pump, the newly designed cross key and the cross key sleeve are used for replacing the original components for back installation, so that the stress is reduced by enlarging the contact area of the cross key and the cross key sleeve, the service life of the cross key is prolonged, the integral service life of the nuclear power duplicate gear pump is prolonged, the working stability of the nuclear power duplicate gear pump is ensured, and the maintenance cost is reduced.

Drawings

In order to explain the technical solution of the present invention more clearly, the present invention will be further explained below with reference to the accompanying drawings and examples, it being understood that the following drawings only show some examples of the present invention and are therefore not to be considered limiting of scope, and that for a person skilled in the art, other relevant drawings can be obtained from these drawings without inventive effort. In the drawings:

FIG. 1 is a schematic structural diagram of a front and rear pump driving gear shaft and a cross key sleeve of a nuclear power double gear pump in the related art;

fig. 2 is a schematic perspective view of a nuclear power double gear pump according to some embodiments of the present invention;

fig. 3 is a schematic view of another direction of the three-dimensional structure of the nuclear power double gear pump according to some embodiments of the present invention;

fig. 4 is a cross-sectional view of a nuclear power double gear pump according to some embodiments of the present invention;

fig. 5 is a schematic diagram of the internal structure of the nuclear power double gear pump according to some embodiments of the present invention;

fig. 6 is a diagram of the mating structure of the gear shaft and the cross key sleeve according to some embodiments of the present invention;

fig. 7 is a schematic diagram of a first drive shaft in some embodiments of the invention;

fig. 8 is a schematic structural diagram of a second drive shaft according to some embodiments of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Please refer to fig. 1 to 8, which are exemplary embodiments of the present invention of a nuclear power dual gear pump, including a first pump 1 and a second pump 2 axially cooperating with each other, the first pump 1 includes a first pump body 11, and a first gear shaft assembly 12 disposed in the first pump body 11, the first gear shaft assembly 12 includes a first driving shaft 121 and a first driven shaft 122 engaged with each other, the second pump 2 includes a second pump body 21 and a second gear shaft assembly 22 disposed in the second pump body 21, the second gear shaft assembly 22 includes a second driving shaft 221 and a second driven shaft 222 engaged with each other, a first U-shaped engaging portion 1211 is disposed at an end of the first driving shaft 121 facing the second driving shaft 221, a second U-shaped engaging portion 2211 is disposed at an end of the second driving shaft 221 facing the first driving shaft 121, the first U-shaped engaging portion 1211 and the second U-shaped engaging portion 2211 are engaged with each other to form a cross key 3, and a cross key sleeve 4 is sleeved on an outer periphery of the cross key 3.

Understandably, the cross key 3 is redesigned and machined according to the existing size of the prokaryotic electric dual gear pump, the newly designed cross key 3 and the cross key sleeve 4 are used for replacing the original components for back assembly, so that the stress is reduced by enlarging the contact area of the cross key 3 and the cross key sleeve 4, the service life of the cross key 3 and the cross key sleeve 4 is prolonged, the working stability of the nuclear electric dual gear pump is ensured, and the maintenance cost is reduced.

In some embodiments, the spider sleeve 4 is a metal piece, which is a unitary structure. Preferably, the cross key sleeve 4 can be made of 45 steel, and the 45 steel has high strength and rigidity, high surface hardness, good processability and impact resistance. In other embodiments, the cross key sleeve 4 may also be made of Q235, 20CR or other metal materials, which are not limited herein. The cross key 3 may also preferably be made of 45 steel. Further, in order to improve the wear resistance of the cross key 3 and the cross key sleeve 4, the surface treatment may be performed on the cross key 3 and the cross key sleeve 4, for example, a metal element Cr and a non-metal element N are implanted into the cross key 3 and the cross key sleeve 4 by an ion implantation method, the implantation direction is perpendicular to the target plane of the cross key 3 or the cross key sleeve 4 by an angle of 20 °, and the implantation energy is provided by an accelerating voltage, and tests show that the wear amount of the cross key 3 and the cross key sleeve 4 after the ion implantation can be reduced by 46% to 48%.

In some embodiments, as shown in fig. 7 and 8, the first U-shaped engaging portion 1211 is a plate-shaped structure, a first through U-shaped groove 12111 is formed at an end of the first U-shaped engaging portion 1211 facing the second driving shaft 221, the second U-shaped engaging portion 2211 is a plate-shaped structure, and a second through U-shaped groove 22111 is formed at an end of the second U-shaped engaging portion 2211 facing the first driving shaft 121. It can be understood that the shape of the first U-shaped engaging portion 1211 matches the shape of the second U-shaped engaging portion 2211, and the shape of the first U-shaped groove 12111 matches the shape of the second U-shaped groove 22111, so that the first U-shaped engaging portion 1211 and the second U-shaped engaging portion 2211 are contacted more sufficiently during butt engagement, and the contact stress between the first U-shaped engaging portion 1211 and the second U-shaped engaging portion 2211 is reduced.

The length of the first U-shaped engaging portion 1211 is 19-20mm, the length of the first U-shaped groove 12111 is one half of the overall length of the first U-shaped engaging portion 1211, the length of the second U-shaped engaging portion 2211 is 19-20mm, the length of the second U-shaped groove 22111 is one half of the overall length of the second U-shaped engaging portion 2211, and the axial length of the cross key sleeve 4 is 19-20mm.

Understandably, the axial thickness of the cross key sleeve that present relevant nuclear power double gear pump adopted generally is 12mm, and the distance of the cross joint end of front and back pump driving gear axle is 6mm, and area of contact is less makes the contact stress of cross key sleeve great, and the utility model discloses a first driving shaft 121 and second driving shaft 221 increase to 20mm from 6mm with the contact length of this cross key sleeve 4 respectively, and this cross key sleeve 4 is extended to 20mm by original 12mm, and this first driving shaft 121 and second driving shaft 221 increase 4 times with the actual area of contact of this cross key sleeve 4 respectively, and under the unchangeable condition of operating pressure, this first driving shaft 121 and second driving shaft 221 fall to original 1/4 with the contact stress of this cross key sleeve 4 respectively to promote the life of this nuclear power double gear pump, guaranteed the stability when this nuclear power double gear pump uses.

Further, the first pump 1 further includes a first front end cap 13 and a first rear end cap 14 disposed at two ends of the first pump body 11, the second pump 2 further includes a second front end cap 23 and a second rear end cap 24 disposed at two ends of the second pump body 21, the first rear end cap 14 is disposed toward the second front end cap 23, one side of the second front end cap 23, which faces the first rear end cap 14, is provided with an accommodating groove 231 for accommodating the cross key 3 and the cross key bush 4 therein, of course, one side of the first rear end cap 14, which faces the second front end cap 23, may also be provided with an accommodating groove matched with the accommodating groove 231 for accommodating the cross key 3 and the cross key bush 4 therein. The first pump body 11, the first front end cover 13 and the first rear end cover 14 are detachably connected, and the second pump body 21, the second front end cover 23 and the second rear end cover 24 are detachably connected.

It can be understood that the first front cover 13 is provided with a positioning through hole 131 for the first driving shaft 121 to pass through, and the first front cover 13 can be connected with the first pump body 11 through a bolt. One end of the first driving shaft 121 protruding from the positioning through hole 131 can be connected to an external mechanism, and the external mechanism can drive the first driving shaft 121 to move. Wherein, the first pump 1 may further include a first mounting seat 18 and a second mounting seat 19 provided at both ends in the first pump body 11, and the second pump 2 may include a third mounting seat 28 and a fourth mounting seat 29 provided at both ends in the second pump body 21.

Preferably, the first mounting seat 18 can be integrally formed with the first front end cover 13, so that the cost can be effectively reduced, the requirement of simplifying assembly can be met, and the overall structure can be firmer and more reliable. Furthermore, the integrated forming structure can be used as a universal standard component, so that various related component types can be effectively reduced, and the universality is improved. In other embodiments, the first mounting seat 18 may also be fixedly connected to the first front end cover 13 by bolts or welding, which is not limited herein. The first rear end cover 14 and the second mounting seat 19 may be integrally formed, and may also be connected by welding or by bolts, bearings for respectively connecting the first driving shaft 121 and the first driven shaft 122 are respectively disposed in the first mounting seat 18 and the second mounting seat 19, and the bearings may effectively reduce the wear of the first driving shaft 121 and the first driven shaft 122, and reduce the transmission resistance.

Further, the first rear end cap 14 and the second front end cap 23 may be bolted together, the cross-sectional shapes of the first rear end cap 14 and the second front end cap 23 may be the same, the third mounting seat 28 and the second front end cap 23 may be integrally formed, and may also be welded or bolted, and the fourth mounting seat 29 and the second rear end cap 24 may be integrally formed, and may also be welded or bolted. Preferably, the first mounting seat 18, the second mounting seat 19, the third mounting seat 28 and the fourth mounting seat 29 may have the same structural shape, which may effectively reduce the number of related devices.

Preferably, a first seal ring 15 is disposed between the first front end cap 13 and the first pump body 11, a second seal ring 16 is disposed between the first pump body 11 and the first rear end cap 14, a third seal ring 25 is disposed between the second front end cap 23 and the second pump body 21, a fourth seal ring 26 is disposed between the second pump body 21 and the second rear end cap 24, and a fifth seal ring 17 is disposed between the first rear end cap 14 and the second front end cap 23. It is understood that the first pump body 11, the first front end cover 13, the first rear end cover 14, the second pump body 21, the second front end cover 23 and the second rear end cover 24 are all provided with a sealing groove 113, the sealing groove 113 is in a race track shape, and the sealing groove 113 is used for accommodating the first sealing ring 15, the second sealing ring 16, the third sealing ring 25, the fourth sealing ring 26 and the fifth sealing ring 17. The first sealing ring 15, the second sealing ring 16, the third sealing ring 25, the fourth sealing ring 26 and the fifth sealing ring 17 are used for increasing the sealing performance inside the nuclear power duplex gear pump, reducing the friction force among all parts, being dustproof and waterproof and being capable of preventing hydraulic oil from leaking out from the gap between the end cover and the pump body.

In some embodiments, the opposite sides of the first pump body 11 are provided with a first inlet port 111 and a first outlet port 112, and the first inlet port 111 and the first outlet port 112 are both facing the engagement between the first driving shaft 121 and the first driven shaft 122. The opposite side of the second pump body 21 is provided with a second liquid inlet 211 and a second liquid outlet 212, and the second liquid inlet 211 and the second liquid outlet 212 both face the engagement position of the second driving shaft 221 and the second driven shaft 222.

It is understood that the oil can enter from the first inlet port 111, and a part of the oil flows out from the first outlet port 112 through the first pump body 11, so as to form a first oil path. If the oil enters from the second liquid inlet 211, a part of the oil flows out from the second liquid outlet 212 through the second pump body 21, so as to form a second oil path.

It is understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A nuclear power double gear pump is characterized by comprising a first pump (1) and a second pump (2) which are axially matched with each other, wherein the first pump (1) comprises a first pump body (11) and a first gear shaft assembly (12) arranged in the first pump body (11), and the first gear shaft assembly (12) comprises a first driving shaft (121) and a first driven shaft (122) which are meshed with each other;

the second pump (2) comprises a second pump body (21) and a second gear shaft assembly (22) arranged in the second pump body (21), and the second gear shaft assembly (22) comprises a second driving shaft (221) and a second driven shaft (222) which are meshed with each other;

a first U-shaped clamping part (1211) is arranged at one end, facing the second driving shaft (221), of the first driving shaft (121);

one end of the second driving shaft (221) facing the first driving shaft (121) is provided with a second U-shaped clamping part (2211);

the first U-shaped clamping part (1211) and the second U-shaped clamping part (2211) are clamped with each other to form a cross key (3), and a cross key sleeve (4) is sleeved on the periphery of the cross key (3).

2. The nuclear power double gear pump according to claim 1, wherein the first U-shaped engaging portion (1211) has a plate-shaped structure, and a first through U-shaped groove (12111) is formed at one end of the first U-shaped engaging portion (1211) facing the second driving shaft (221);

the second U-shaped clamping part (2211) is of a plate-shaped structure, and a through second U-shaped groove (22111) is formed in one end, facing the first driving shaft (121), of the second U-shaped clamping part (2211).

3. The nuclear-power double gear pump according to claim 2, characterized in that the length of the first U-shaped engaging portion (1211) is 19-20mm, and the length of the first U-shaped groove (12111) is half of the overall length of the first U-shaped engaging portion (1211);

the length of the second U-shaped clamping part (2211) is 19-20mm, and the length of the second U-shaped groove (22111) is one half of the whole length of the second U-shaped clamping part (2211);

the axial length of the cross key sleeve (4) is 19-20mm.

4. The nuclear duplicate gear pump according to any of claims 1 to 3, characterized in that the first pump (1) further comprises a first front end cover (13) and a first rear end cover (14) provided at both ends of the first pump body (11), the second pump (2) further comprises a second front end cover (23) and a second rear end cover (24) provided at both ends of the second pump body (21), the first rear end cover (14) being disposed towards the second front end cover (23);

one side of the second front end cover (23) facing the first rear end cover (14) is provided with a containing groove (231) for containing the cross key (3) and the cross key sleeve (4).

5. The nuclear-power double gear pump according to claim 4, characterized in that the first pump body (11), the first front end cover (13) and the first rear end cover (14) are removably connected;

the second pump body (21), the second front end cover (23) and the second rear end cover (24) are detachably connected.

6. The nuclear double gear pump according to claim 5, characterized in that a first sealing ring (15) is arranged between the first front end cover (13) and the first pump body (11), and a second sealing ring (16) is arranged between the first pump body (11) and the first rear end cover (14);

a third sealing ring (25) is arranged between the second front end cover (23) and the second pump body (21), and a fourth sealing ring (26) is arranged between the second pump body (21) and the second rear end cover (24).

7. The nuclear power double gear pump according to claim 6, characterized in that a fifth sealing ring (17) is arranged between the first rear end cover (14) and the second front end cover (23).

8. The nuclear power double gear pump according to any one of claims 1 to 3, characterized in that the opposite sides of the first pump body (11) are provided with a first inlet port (111) and a first outlet port (112);

the first liquid inlet (111) and the first liquid outlet (112) face to the meshing position of the first driving shaft (121) and the first driven shaft (122).

9. The nuclear power dual gear pump according to any one of claims 1 to 3, characterized in that the opposite lateral faces of the second pump body (21) are provided with a second liquid inlet (211) and a second liquid outlet (212);

the second liquid inlet (211) and the second liquid outlet (212) face the meshing position of the second driving shaft (221) and the second driven shaft (222).

10. The nuclear power double gear pump according to any one of claims 1 to 3, characterized in that the cross-key sleeve (4) is a metal piece.

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