CN209671223U - A kind of bearing-free motor vector pump - Google Patents

Abstract

The utility model discloses a kind of bearing-free motor vector pumps, including pump head, pressure-resistant bucket, pressure-resistant bucket lower end and pump head are tightly connected, pressure-resistant bucket upper end is sealedly connected with electric machine casing, the intracorporal bottom wall of motor casing axially offers the axis hole coaxial with pressure-resistant bucket, transmission shaft is provided in axis hole, transmission shaft lower end passes through pressure-resistant bucket and extends in pump head, and its lower end is connected by bearing with the bottom wall in pump head, the guide vane and impeller of cascaded coordination are provided in pressure-resistant bucket, and guide vane is connect with transmission shaft driven.The utility model combines water pump shell, motor front end cover, electric machine casing together, pump shaft is penetrated in the hollow shaft sleeve of magneto again, pump shaft and motor shaft are combined together, guarantee that motor casing guarantees the concentric of motor shaft and pump shaft with water pump cover while concentric, the torque of motor is directly passed to pump shaft, compact-sized, assembly precision is high, can all have greatly improved in terms of power density and efficiency.

Description

A kind of bearing-free motor vector pump

Technical field

The utility model relates to water pump technology more particularly to a kind of bearing-free motor vector pumps.

Background technique

The connection type of motor and water pump is mainly directly connected to connect with shaft coupling at present.It is directly connected to be that impeller is straight It connects on the extension shaft for being mounted on motor, or connects pump shaft and motor reel with sleeve.For this arrangement, it shall be noted that The beat or axial float for being to ensure that motor reel must not cause plus the tolerance of machine between water pump shell and water pump rotor Contact.If the impeller of water pump is by nut come when positioning, the direction of nut screw thread must take into account the direction of rotation of motor. Occasion that cannot be coaxially connected in water pump and motor, the overwhelming majority are connected using shaft coupling.But shaft coupling connection request is high: no Only want that biggish torque can be generated with lesser size, and there is certain axial offset ability, with prevent motor reel with Generate biggish axial load and radial load between pump shaft on motor bearings because of axial offset.Meanwhile the assembling mode Cause system structure not compact, overall volume is larger after assembling, and occupied space is big, now designs in view of the above problems a kind of shaftless Bearing motor vector pump.

Utility model content

The purpose of this utility model is to provide a kind of bearing-free motor vector pumps, have compact-sized advantage, solve Structure is not compact, and overall volume is larger after assembling, the big problem of occupied space.

In order to achieve the above objectives, the utility model adopts the following technical solution: a kind of bearing-free motor vector pump, including pump Head, pressure-resistant bucket, pressure-resistant bucket lower end and pump head are tightly connected, and pressure-resistant bucket upper end is sealedly connected with electric machine casing, and motor casing is intracorporal Bottom wall axially offers the axis hole coaxial with pressure-resistant bucket, and transmission shaft is provided in axis hole, and transmission shaft lower end passes through pressure-resistant bucket and prolongs It extends in pump head, and its lower end is connected by bearing with the bottom wall in pump head, and the guide vane of cascaded coordination is provided in pressure-resistant bucket And impeller, and guide vane is connect with transmission shaft driven, transmission shaft upper end extends in electric machine casing, is provided with and passes in electric machine casing The driving assembly of driving-axle gearing connection.

Further, it is fastenedly connected between pressure-resistant bucket side electric machine casing and pump head by several hold-down bolts.

Further, transmission shaft includes hollow shaft, pump shaft, and hollow shaft axially offers through-hole, and hollow shaft sleeve is located at water Pump shaft upper end, each guide vane are set in the middle part of pump shaft, and pump shaft lower end is fixedly connected by bearing with pump head.

Further, hollow shaft includes bearing fixed part, and bearing fixed part top is radially provided with rotor fixed part, and bearing is solid Determine in subordinate portion insertion axis hole, and is fixed in axis hole by integrated mechanical sealing, the bearing above integrated mechanical sealing Oil sealing is arranged on fixed part.

Further, driving assembly includes stator, permanent magnet, and stator is fixed in electric machine casing, and permanent magnet, which is set in, to be turned On sub- fixed part.

Further, bearing is sliding bearing.

The utility model has the beneficial effect that compared with prior art

1. water pump shell, motor front end cover, electric machine casing combine together, and pump shaft are penetrated the hollow shaft sleeve of magneto It is interior, pump shaft and motor shaft are combined together, guarantee that motor casing guarantees the same of motor shaft and pump shaft with water pump cover while concentric The heart, the torque of motor is directly passed to pump shaft, compact-sized, and assembly precision is high, all can in terms of power density and efficiency Have greatly improved；

2. bearing-free inside permanent magnet synchronous motor, structure is simple, easy for installation, while can shorten motor axial dimension, electricity Machine power density is higher；

3. permanent magnet synchronous motor is integrated with water pump, the concentricity of shell concentricity and axis is high, can eliminate motor due to Magnetic pull caused by bias, motor noise is small, runs more stable；

4. motor front end cover and water pump end cap are integrated, shaft coupling is eliminated, motor torque is directly passed to water pump, knot Structure is compact, and whole efficiency is high, at low cost；

5. using mechanical seal and oil sealing dual-seal, while motor stator being filled with epoxide-resin glue, motor protection etc. Grade is high

It is two support point locations, more 6. water pump and motor are positioned only with a bearing, an integrated mechanical sealing It is easily guaranteed that its concentricity, and when bearing is the more convenient assembly of self-aligning bearing.

Detailed description of the invention

Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.

In the accompanying drawings:

Fig. 1 be the utility model proposes a kind of bearing-free motor vector pump structural schematic diagram；

Fig. 2 be the utility model proposes pump head, pressure-resistant bucket, electric machine casing integral structure schematic diagram；

Fig. 3 be the utility model proposes transmission shaft structural schematic diagram.

In figure: 1- pump head, 2- pressure resistance bucket, 3- electric machine casing, 4- axis hole, 5- transmission shaft, 6- bearing, 7- rotor fixed part, 8- bearing fixed part, 9- permanent magnet, 10- stator, 11- guide vane, 12- impeller, 13- pump shaft, 15- oil sealing, 16- hold-down bolt, 17- integrated mechanical sealing, 18- end cap, 19- screw, 20- through-hole, 21- hollow shaft.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig.1-3, a kind of bearing-free motor vector pump, including pump head 1, pressure-resistant bucket 2, pressure-resistant 2 lower end of bucket and pump head 1 are close Envelope connection, it is characterised in that pressure-resistant 2 upper end of bucket is sealedly connected with electric machine casing 3, the bottom wall in electric machine casing 3 axially offer with The coaxial axis hole 4 of pressure-resistant bucket 2, transmission shaft 5 is provided in axis hole 4, and 5 lower end of transmission shaft passes through pressure-resistant bucket 2 and extends to pump head 1 It is interior, and its lower end is connected by bearing 6 with the bottom wall in pump head 1, and 11 He of guide vane of cascaded coordination is provided in pressure-resistant bucket 2 Impeller 12, and guide vane 11 and transmission shaft 5 are sequentially connected, 5 upper end of transmission shaft extends in electric machine casing 3, sets in electric machine casing 3 It is equipped with the driving assembly being sequentially connected with transmission shaft 5.

It is fastenedly connected between pressure-resistant 3 side electric machine casing 3 of bucket and pump head 2 by several hold-down bolts 16；Transmission shaft 5 includes Hollow shaft 21, pump shaft 13, hollow shaft 21 is axial to offer through-hole 20, and hollow shaft 21 is set in 13 upper end of pump shaft, each guide vane 11 are set in 13 middle part of pump shaft, and 13 lower end of pump shaft is fixedly connected by bearing 6 with pump head 1；Hollow shaft 21 is solid including bearing Determine portion 8,8 top of bearing fixed part is radially provided with rotor fixed part 7, and 8 lower part of bearing fixed part is inserted into axis hole 4, and passes through collection Dress formula mechanical seal 17 is fixed in axis hole 4, is arranged with oil sealing 15 on the bearing fixed part 8 of 17 top of integrated mechanical sealing； Driving assembly includes stator 10, permanent magnet, and stator 10 is fixed in electric machine casing 3, and permanent magnet 9 is set on rotor fixed part 7； Bearing 6 is sliding bearing；Bearing 6 is self-aligning bearing, and the fit system of pump shaft 13 and hollow shaft upper shaft hole 4 is interference fit, Not only can play the role of sealing but also transmission agency can be played, or with key, pin be driving member.

Motor shaft 10 uses hollow shaft sleeve structure, is connected directly with pump shaft 13, ensure that electricity while saving shaft coupling The consistency of 2 axis of machine ontology 1 and water pump body, it is therefore prevented that axial load caused by axial offset and radial load.

First 10 hot charging of stator is entered in electric machine casing 3, then permanent magnet 9 is installed on rotor fixed part 7, bearing is fixed Portion 8 is put into axis hole 4, and oil sealing 15, integrated mechanical sealing 17 are inserted in below motor casing, realizes sealing installation, later The lower end of pump shaft 13 is fixed on pump head 1 by bearing, then by guide vane 11, the installation of 12 component of impeller, is then put on Electric machine casing 3 with hollow shaft is placed on pressure-resistant bucket 2 by pressure-resistant bucket 2, and it is hollow that the upper end of pump shaft 13 is inserted into It in the axis hole 4 of axis, and completes to fix with pin, while simultaneously hold-down bolt 16 is fixed by pump head 1, pressure-resistant bucket 2, with electric machine casing 3, Finally the screw 19 of end cap 18 is fixed on motor casing, that is, completes installation, the above is only device installation sides in the utility model One of method, other conventional installation methods of the art also may be used.

Place is not described in detail for the utility model, is the well-known technique of those skilled in the art.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. a kind of bearing-free motor vector pump, including pump head (1), pressure-resistant bucket (2), pressure-resistant bucket (2) lower end and pump head (1) sealing connect It connects, it is characterised in that pressure-resistant bucket (2) upper end is sealedly connected with electric machine casing (3), and the bottom wall in electric machine casing (3) axially offers The axis hole (4) coaxial with pressure-resistant bucket (2), axis hole (4) is interior to be provided with transmission shaft (5), and transmission shaft (5) lower end passes through pressure-resistant bucket (2) And it extends in pump head (1), and its lower end is connected by bearing (6) with the bottom wall in pump head (1), setting in pressure-resistant bucket (2) There are the guide vane (11) and impeller (12) of cascaded coordination, and guide vane (11) and transmission shaft (5) are sequentially connected, transmission shaft (5) upper end is prolonged It extends in electric machine casing (3), the driving assembly with transmission shaft (5) transmission connection is provided in electric machine casing (3).

2. bearing-free motor vector pump according to claim 1, it is characterised in that: pressure-resistant bucket (2) side electric machine casing (3) It is fastenedly connected between pump head (1) by several hold-down bolts (16).

3. bearing-free motor vector pump according to claim 1, it is characterised in that: transmission shaft (5) include hollow shaft (21), Pump shaft (13), hollow shaft (21) axially offer through-hole (20), and hollow shaft (21) is set in pump shaft (13) upper end, each guide vane (11) it is set in the middle part of pump shaft (13), pump shaft (13) lower end is fixedly connected by bearing (6) with pump head (1).

4. bearing-free motor vector pump according to any one of claims 1 to 3, it is characterised in that: hollow shaft (21) includes Bearing fixed part (8), bearing fixed part (8) top are radially provided with rotor fixed part (7), and axis is inserted into bearing fixed part (8) lower part In hole (4), and it is fixed in axis hole (4) by integrated mechanical sealing (17), the bearing above integrated mechanical sealing (17) Oil sealing (15) are arranged on fixed part (8).

5. bearing-free motor vector pump according to claim 4, it is characterised in that: driving assembly includes stator (10), forever Magnet, stator (10) are fixed in electric machine casing (3), and permanent magnet (9) is set on rotor fixed part (7).

6. bearing-free motor vector pump according to claim 3, it is characterised in that: bearing (6) is sliding bearing.