End face compensation two-way rotor pump

Abstract

The end face compensation bidirectional rotor pump comprises a pump body unit, a rotor unit and a push plate positioning unit, the pump body unit comprises a pump body, a pump cover and a driving shaft, the pump body and the pump cover are fixedly connected through a fastener, a pump cavity is formed in the pump body, the driving shaft is arranged in the pump body in a penetrating mode, and the rotor unit comprises an inner rotor and an outer rotor. The inner rotor is fixed on the driving shaft, the outer rotor is meshed with the inner rotor, and the driving shaft drives the inner rotor to rotate; the push plate positioning unit comprises a plurality of push plates, a push plate positioning sleeve and a rubber ring, the push plate positioning unit is arranged between the rotor unit and the pump body unit, and the push plates are attached to the end face of the rotor unit under the elastic force action of the rubber ring. According to the end face compensation bidirectional rotor pump, leakage caused by an end face gap is effectively reduced through the end face compensation mechanism, meanwhile, the bidirectional rotation function of the pump is achieved, and the volume efficiency and flexibility of the pump are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fluid machinery, and in particular to an end-face-compensated bidirectional rotor pump. Background Art

[0002] As a common fluid delivery equipment, rotor pumps are widely used in the petroleum, chemical, food and other industries. When traditional rotor pumps are in operation, the presence of end face clearance often causes fluid leakage, affecting the volumetric efficiency and performance of the pump. In addition, most rotor pumps are designed to rotate in one direction, which limits their application in certain situations that require bidirectional fluid delivery. Summary of the invention

[0003] In view of the above-mentioned deficiencies of current rotor pumps, the present invention provides an end face compensated bidirectional rotor pump, which effectively reduces the leakage caused by the end face gap through the end face compensation mechanism, while realizing the bidirectional rotation function of the pump, thereby improving the volumetric efficiency and flexibility of the pump.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: A bidirectional rotor pump with end face compensation comprises a pump body unit, wherein the pump body unit comprises a pump body, a pump cover and a drive shaft, wherein the pump body and the pump cover are fixedly connected by fasteners, a pump cavity is formed in the pump body, the drive shaft is passed through the pump body, and further comprises a rotor unit and a push plate positioning unit, wherein the rotor unit comprises an inner rotor and an outer rotor, the inner rotor is fixed on the drive shaft, the outer rotor is meshingly connected with the inner rotor, and the drive shaft drives the inner rotor to rotate; the push plate positioning unit comprises a plurality of push plates, a push plate positioning sleeve and a rubber ring, wherein the push plate positioning unit is arranged between the rotor unit and the pump body unit, and the push plate fits the end face of the rotor unit under the elastic force of the rubber ring to compensate for the end face gap.

[0005] In one embodiment, the push plate includes a first push plate arranged between the rotor unit and the pump body, and a second push plate arranged between the rotor unit and the pump cover; a first rubber ring is arranged between the first push plate and the pump body, and a second rubber ring is arranged between the second push plate and the pump cover.

[0006] In one embodiment, the push plate positioning sleeve is respectively embedded and connected between the first push plate and the pump body and between the second push plate and the pump cover.

[0007] In one embodiment, the rubber ring is a crescent rubber ring, and the crescent rubber ring is fixed to the push plate by interference fit or adhesive connection.

[0008] In one embodiment, a plurality of symmetrical unloading grooves are provided on the push plate.

[0009] In one embodiment, the pump body and the pump cover are provided with an integrally formed boss on the inner side close to the drive shaft, the boss and the push plate abut against each other, and the boss and the push plate positioning sleeve jointly position the push plate.

[0010] In one embodiment, a first bushing is provided between the outer rotor and the pump body.

[0011] In one embodiment, a second bushing is provided between the pump body and the drive shaft; and a third bushing is provided between the pump cover and the drive shaft.

[0012] In one embodiment, the pump cover is provided with an oil inlet and an oil outlet.

[0013] The beneficial effect of the present invention is to provide an end-face-compensated bidirectional rotor pump, including a pump body unit, a rotor unit and a push plate positioning unit, the push plate positioning unit including a plurality of push plates, a push plate positioning sleeve and a rubber ring, the push plate positioning unit is arranged between the rotor unit and the pump body unit, and the push plate fits the end face of the rotor unit under the elastic force of the rubber ring. This device effectively reduces the end face gap and significantly reduces the leakage through the elastic force of the crescent rubber ring and the fitting effect of the push plate, thereby improving the volumetric efficiency of the pump; by reducing leakage, the wear of components is reduced and the service life of the rotor pump is extended. The drive shaft of the rotor pump can rotate in both directions, and the flow rate of the inlet and outlet oil can be flexibly switched with the direction of the drive shaft, thereby broadening the application range of the rotor pump; the various components are tightly connected, the structure is compact, and it is easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a structural schematic diagram of the end-face-compensated bidirectional rotor pump of the present invention; Figure 2 It is a cross-sectional view of the end-compensated bidirectional rotor pump described in the present invention.

[0016] The accompanying drawings are marked as follows: 1, pump body; 2, pump cover; 3, drive shaft; 4, inner rotor; 5, outer rotor; 6, first rubber ring; 61, second rubber ring; 7, first push plate; 8, second push plate; 9, first bushing; 10, second bushing; 11, third bushing; 12, push plate positioning sleeve; 13, boss. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0021] An end-face-compensated bidirectional rotor pump, the structure of which is as follows Figure 1 and Figure 2 As shown, it includes a pump body unit, a rotor unit, and a push plate positioning unit. The pump body unit includes a pump body 1, a pump cover 2 and a drive shaft 3. The pump body 1 and the pump cover 2 are fixedly connected by fasteners. A pump cavity is formed in the pump body 1, and the pump cavity is used to accommodate the inner and outer rotors 5. The drive shaft 3 is penetrated in the pump body 1. The pump body 1, as the main structure of the rotor pump, is made of high-strength cast iron material. The shape and size of the pump body 1 can be determined according to the design flow and pressure of the rotor pump. An oil hole is provided on the drive shaft 3 for lubricating the shaft hole and collecting the leaked fluid. The drive shaft 3 is made of high-strength alloy steel material to ensure its sufficient strength and rigidity.

[0022] The rotor unit includes an inner rotor 4 and an outer rotor 5. The inner rotor 4 is fixed on the drive shaft 3. The outer rotor 5 is meshed with the inner rotor 4. The drive shaft 3 drives the inner rotor 4 to rotate. A first bushing 9 is provided between the outer rotor 5 and the pump body 1. The bushing is made of wear-resistant alloy material to reduce friction and wear and protect the pump body 1.

[0023] The push plate positioning unit includes a plurality of push plates, a push plate positioning sleeve 12 and a rubber ring. The push plate positioning unit is arranged between the rotor unit and the pump body unit. The push plate fits the end face of the rotor unit under the elastic force of the rubber ring to compensate for the end face gap. Specifically, the push plate includes a first push plate 7 arranged between the rotor unit and the pump body 1, and a second push plate 8 arranged between the rotor unit and the pump cover 2; a first rubber ring 6 is arranged between the first push plate 7 and the pump body 1, and a second rubber ring 61 is arranged between the second push plate 8 and the pump cover 2. The above-mentioned rubber ring is a crescent rubber ring, which is fixed to the push plate by interference fit or adhesive connection, which not only plays a sealing role, but also can push the push plate to fit the rotor through its elastic force to reduce the end face gap. The crescent rubber ring is made of a highly elastic and wear-resistant rubber material. There are also multiple symmetrical unloading grooves on the push plate. In this embodiment, the number of unloading grooves is two, which are used to balance the pressure and reduce the uneven force on the push plate. The push plate is made of high-strength alloy material to ensure that it has sufficient rigidity and wear resistance.

[0024] In addition, the push plate positioning sleeve 12 is respectively embedded and connected between the first push plate 7 and the pump body 1 and between the second push plate 8 and the pump cover 2. The push plate positioning sleeve 12 is used to accurately locate the relative position of the push plate and the pump body 1 or the pump cover 2. The push plate positioning sleeve 12 is made of stainless steel material and has high strength and corrosion resistance.

[0025] The pump body 1 and the pump cover 2 are provided with an integrally formed boss 13 on the inner side near the drive shaft 3. The boss 13 and the push plate abut against each other, and the boss 13 and the push plate positioning sleeve 12 jointly position the push plate. The device adopts a method of providing the boss 13 on the pump body 1 or the pump cover 2, fixing the push plate with a positioning pin, providing a positioning hole on the boss 13, and providing a corresponding positioning pin hole on the push plate. The push plate is fixed to the boss 13 of the pump body 1 or the pump cover 2 by the positioning pin to prevent the push plate from rotating with the rotor.

[0026] In practical applications, a second bushing 10 is provided between the pump body 1 and the drive shaft 3 ; and a third bushing 11 is provided between the pump cover 2 and the drive shaft 3 .

[0027] In practical applications, the pump cover 2 is provided with an oil inlet and an oil outlet for inputting and outputting fluids, and the size and position of the oil inlet and the oil outlet can be determined according to the design flow and pressure of the rotor pump. The pump cover 2 is made of high-strength cast iron material and matches the pump body 1.

[0028] When in use, assemble the pump body 1, bushing, push plate, push plate positioning sleeve 12, pump cover 2 and other parts together according to the above content to form a complete pump body 1 structure. Install the inner rotor 4, outer rotor 5, crescent rubber ring, drive shaft 3 and other parts into the pump chamber, and connect the oil inlet and oil outlet. Start the drive shaft 3, so that the inner rotor 4 drives the outer rotor 5 to rotate, sucking the fluid from the oil inlet and discharging it from the oil outlet. Because the push plate fits the end faces of the inner rotor 4 and the outer rotor 5 under the elastic force of the crescent rubber ring, the end face gap is compensated, so the leakage can be significantly reduced and the volumetric efficiency of the rotor pump can be improved. At the same time, the design of the pump allows the drive shaft 3 to rotate in both directions, so the flow direction of the inlet and outlet oil can be flexibly switched as needed. Example

[0029] The difference from the first embodiment is that the device adopts a boss 13 provided on the pump body 1 or the pump cover 2, and a groove is provided on the pump body 1 or the pump cover 2 so that the edge of the push plate is embedded in the groove, and the push plate is placed to rotate with the rotor through the limiting effect of the groove. This method has a simple structure and is easy to process and assemble.

[0030] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of the patent of the present invention.

[0031] In order to make it easier for ordinary technicians in the field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are omitted in this application document. Ordinary technicians in the field should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. An end-face-compensated bidirectional rotor pump, comprising a pump unit, wherein the pump unit comprises a pump body (1), a pump cover (2) and a drive shaft (3), wherein the pump body (1) and the pump cover (2) are fixedly connected by fasteners, a pump cavity is formed in the pump body (1), and the drive shaft (3) is inserted into the pump body (1), characterized in that: It also includes a rotor unit and a push plate positioning unit, wherein the rotor unit includes an inner rotor (4) and an outer rotor (5), the inner rotor (4) is fixed on the drive shaft (3), the outer rotor (5) is meshedly connected with the inner rotor (4), and the drive shaft (3) drives the inner rotor (4) to rotate; the push plate positioning unit includes a plurality of push plates, a push plate positioning sleeve (12) and a rubber ring, and the push plate positioning unit is arranged between the rotor unit and the pump body unit, and the push plate fits the end face of the rotor unit under the elastic force of the rubber ring to compensate for the end face gap.

2. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: The push plate comprises a first push plate (7) arranged between the rotor unit and the pump body (1), and a second push plate (8) arranged between the rotor unit and the pump cover (2); a first rubber ring (6) is arranged between the first push plate (7) and the pump body (1), and a second rubber ring (61) is arranged between the second push plate (8) and the pump cover (2).

3. The end-face-compensated bidirectional rotor pump according to claim 2, characterized in that: The push plate positioning sleeve (12) is respectively embedded and connected between the first push plate (7) and the pump body (1) and between the second push plate (8) and the pump cover (2).

4. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: The rubber ring is a crescent rubber ring, and the crescent rubber ring is fixed on the push plate by interference fit or bonding connection.

5. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: The push plate is provided with a plurality of symmetrical unloading grooves.

6. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: The pump body (1) and the pump cover (2) are provided with an integrally formed boss (13) on the inner side close to the drive shaft (3); the boss (13) and the push plate abut against each other; the boss (13) and the push plate positioning sleeve (12) jointly position the push plate.

7. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: A first bushing (9) is provided between the outer rotor (5) and the pump body (1).

8. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: A second bushing (10) is provided between the pump body (1) and the drive shaft (3); and a third bushing (11) is provided between the pump cover (2) and the drive shaft (3).

9. The end-face-compensated bidirectional rotor pump according to claim 1, characterized in that: The pump cover (2) is provided with an oil inlet and an oil outlet.

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