Multi-layer sealed integrated booster pump structure

Abstract

The utility model discloses a multi-layer sealed integrated booster pump structure, and belongs to the technical field of booster pumps. Comprising a motor shell and an impeller cover which are mutually clamped and connected, the outer side of the contact face of the motor shell and the impeller cover is concaved inwards in the circumferential direction to form an annular embedding part, the outer side of the contact face of the impeller cover and the motor shell is protruded outwards in the circumferential direction to form an annular clamping part, and the annular embedding part and the annular clamping part are matched with each other for fixation. An annular groove is formed in the contact face of the annular embedding part and the annular clamping part, a rectangular sealing ring is arranged in the groove, an annular groove is formed in the side, close to the annular embedding part, of the contact face of the motor shell and the impeller cover, and a spring sealing ring is arranged in the groove. The motor shell is integrally arranged and is effectively sealed with the impeller cover in a multi-layer sealing mode, a rectangular sealing ring is arranged on a transverse contact surface, a spring plug sealing ring is arranged on a longitudinal contact surface for sealing, and the sealing performance between the motor shell and the impeller cover is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of booster pumps, in particular to a multi-layer sealed integrated booster pump structure. Background Art

[0002] As the pressure of liquefied natural gas is constantly increasing, the output pressure is slow. Without a fuel pump, it takes about 1 to 3 hours to meet the pressure value. The pressure cannot meet the normal operation of the vehicle. Therefore, a new type of integrated fuel pump (with a drive controller and a motor connected in parallel) is produced, referred to as LNG fuel pump, which can complete the pressure value of 0.9 to 1.2Mpa in 15min to 20min, and the maximum pressure value is 2.5Mpa.

[0003] The existing booster pump has problems with the sealing of the internal three-phase lead-out wires, which are fixed by an insulating plate and 6 fastening bolts. This causes liquefied gas leakage when the product is operating at -80° or lower, resulting in unstable boosting performance and failure to build pressure. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model

[0005] The utility model aims to solve the problem of poor sealing effect of the existing integrated booster pump structure.

[0006] 2. Technical solution

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0008] The utility model discloses a multi-layer sealed integrated booster pump structure, comprising a motor housing and an impeller cover which are clamped and connected to each other, wherein the outer side of the contact surface between the motor housing and the impeller cover is circumferentially recessed inward to form an annular embedded portion, and the outer side of the contact surface between the impeller cover and the motor housing is circumferentially protruded outward to form an annular clamping portion, and the annular embedded portion and the annular clamping portion cooperate with each other to be fixed, and the contact surfaces between the annular embedded portion and the annular clamping portion are provided with an annular groove, and a rectangular sealing ring is provided in the groove, and an annular groove is provided on the side of the contact surface between the motor housing and the impeller cover close to the annular embedded portion, and a pan-seal ring is provided in the groove.

[0009] Preferably, a cavity is provided in the motor housing and a motor is placed in the cavity, and the motor is provided with a motor shaft connected to the impeller in the impeller cover.

[0010] Preferably, the motor includes a rotor core, magnetic steel sheets and a stator core which are arranged in sequence from the inside to the outside.

[0011] Preferably, the motor shaft is also connected to a partition via a bearing, and the partition is arranged on a side of the motor housing close to the impeller cover.

[0012] Preferably, magnetic steel pressure plates are provided at both axial ends of the magnetic steel sheet.

[0013] Preferably, the motor is also provided with an insulating frame.

[0014] Preferably, a rear end cover is connected to a side of the motor housing away from the impeller cover, and a contact surface between the motor housing and the impeller cover is recessed inward to form a groove, and a sealing ring is provided in the groove.

[0015] Preferably, a cavity is provided on a side of the motor housing away from the impeller cover and a sintered socket is provided inside the cavity, and a contact surface between the sintered socket and the motor housing is recessed inward to form a groove and a second sealing ring is provided inside the groove.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0018] The utility model discloses a multi-layer sealed integrated booster pump structure, comprising a motor housing and an impeller cover that are mutually clamped and connected, the outer circumferential side of the contact surface between the motor housing and the impeller cover is inwardly recessed to form an annular embedded portion, the outer circumferential side of the contact surface between the impeller cover and the motor housing is outwardly protruded to form an annular clamping portion, the annular embedded portion and the annular clamping portion cooperate with each other for fixing, the contact surface between the annular embedded portion and the annular clamping portion is provided with an annular groove and a rectangular sealing ring is provided in the groove, the side of the contact surface between the motor housing and the impeller cover close to the annular embedded portion is provided with an annular groove and a universal seal ring is provided in the groove. The motor housing is integrated and effectively sealed with the impeller cover by a multi-layer sealing method, not only a rectangular sealing ring is provided on the transverse contact surface, but also a universal seal ring is provided on the longitudinal contact surface for sealing, which greatly improves the sealing between the motor housing and the impeller cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of a multi-layer sealed integrated booster pump structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a multi-layer sealed integrated booster pump structure of the utility model.

[0021] Explanation of the symbols in the schematic diagram:

[0022] 1. Motor housing; 2. Rear cover; 3. Partition; 4. Impeller cover; 5. Bolt 1; 6. Sealing ring 1; 7. Sealing ring 2; 8. Bolt 2; 9. Impeller; 10. Stator core; 11. Magnetic steel sheet; 12. Rotor core; 13. Motor shaft; 14. Magnetic steel pressure plate; 15. Sintered socket; 16. Bearing; 17. Insulation frame; 18. Rectangular sealing ring; 19. Universal sealing ring; 20. Fixing screws. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0027] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Example 1

[0030] See attached Figure 1-2 The present embodiment is a multi-layer sealed integrated booster pump structure, characterized in that it includes a motor housing 1 and an impeller cover 4 that are mutually clamped and connected, the outer side of the contact surface between the motor housing 1 and the impeller cover 4 is circumferentially inwardly recessed to form an annular embedded portion, the outer side of the contact surface between the impeller cover 4 and the motor housing 1 is circumferentially protruding outwardly to form an annular clamping portion, the annular embedded portion and the annular clamping portion cooperate with each other for fixing, the contact surface between the annular embedded portion and the annular clamping portion is provided with an annular groove, and a rectangular sealing ring 18 is provided in the groove, and the side of the contact surface between the motor housing 1 and the impeller cover 4 close to the annular embedded portion is provided with an annular groove, and a Varisil sealing ring 19 is provided in the groove. The motor housing 1 of the present embodiment is integrated and effectively sealed with the impeller cover 4 by a multi-layer sealing method, not only a rectangular sealing ring 18 is provided on the transverse contact surface, but also a Varisil sealing ring 19 is provided on the longitudinal contact surface for sealing, which greatly improves the sealing between the motor housing 1 and the impeller cover 4.

[0031] The motor housing 1 is provided with a cavity and a motor is placed in the cavity. The motor is provided with a motor shaft 13 connected to the impeller 9 in the impeller cover 4. The motor housing 1 and the impeller cover 4 of this embodiment are fixed by bolts 1 5, and the motor housing 1 and the rear end cover 2 are fixed by bolts 2 8.

[0032] The motor comprises a rotor core 12, a magnetic steel sheet 11 and a stator core 10 which are arranged in sequence from the inside to the outside.

[0033] The motor shaft 13 is also connected to the partition 3 through a bearing 16. The partition 3 is arranged on a side of the motor housing 1 close to the impeller cover 4. Magnetic steel pressure plates 14 are arranged at both axial ends of the magnetic steel sheet 11. The motor is also provided with an insulating frame 17.

[0034] The side of the motor housing 1 away from the impeller cover 4 is connected to the rear end cover 2, and the contact surface between the motor housing 1 and the impeller cover 4 is recessed inward to form a groove, and a sealing ring 6 is arranged in the groove. The side of the motor housing 1 away from the impeller cover 4 is provided with a cavity and a sintered socket 15 is arranged in it, and the contact surface between the sintered socket 15 and the motor housing 1 is recessed inward to form a groove, and a sealing ring 2 7 is arranged in the groove. The sealing ring 6 improves the sealing performance of the contact surface between the motor housing 1 and the rear end cover 2, and further improves the overall sealing. The sintered socket 15 is fixed to the motor housing 1 by fixing screws 20.

[0035] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A multi-layer sealed integrated booster pump structure, characterized in that: The invention comprises a motor housing (1) and an impeller cover (4) which are locked and connected to each other, wherein the outer side of the contact surface between the motor housing (1) and the impeller cover (4) is circumferentially recessed inward to form an annular embedding portion, and the outer side of the contact surface between the impeller cover (4) and the motor housing (1) is circumferentially protruding outward to form an annular locking portion, and the annular embedding portion and the annular locking portion cooperate with each other to be fixed, and the contact surfaces between the annular embedding portion and the annular locking portion are provided with an annular groove, and a rectangular sealing ring (18) is provided in the groove, and an annular groove is provided on the side of the contact surface between the motor housing (1) and the impeller cover (4) close to the annular embedding portion, and a pan seal ring (19) is provided in the groove.

2. The multi-layer sealed integrated booster pump structure according to claim 1, characterized in that: A cavity is provided in the motor housing (1) and a motor is placed in the cavity. The motor is provided with a motor shaft (13) connected to an impeller (9) in the impeller cover (4).

3. The multi-layer sealed integrated booster pump structure according to claim 2, characterized in that: The motor comprises a rotor iron core (12), a magnetic steel sheet (11) and a stator iron core (10) which are arranged in sequence from the inside to the outside.

4. The multi-layer sealed integrated booster pump structure according to claim 2, characterized in that: The motor shaft (13) is also connected to a partition plate (3) via a bearing (16); the partition plate (3) is arranged on a side of the motor housing (1) close to the impeller cover (4).

5. The multi-layer sealed integrated booster pump structure according to claim 3, characterized in that: Magnetic steel pressing plates (14) are provided at both axial ends of the magnetic steel sheet (11).

6. The multi-layer sealed integrated booster pump structure according to claim 3, characterized in that: The motor is also provided with an insulating frame (17).

7. The multi-layer sealed integrated booster pump structure according to claim 3, characterized in that: A rear end cover (2) is connected to a side of the motor housing (1) away from the impeller cover (4); a contact surface between the motor housing (1) and the impeller cover (4) is recessed inward to form a groove, and a sealing ring (6) is provided in the groove.

8. The multi-layer sealed integrated booster pump structure according to claim 7, characterized in that: A cavity is provided on a side of the motor housing (1) away from the impeller cover (4) and a sintered socket (15) is provided therein; a contact surface between the sintered socket (15) and the motor housing (1) is recessed inward to form a groove and a second sealing ring (7) is provided in the groove.

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