Spring pin type blade liquefied gas pump

Abstract

The utility model discloses a spring pin type vane liquefied gas pump, and relates to the technical field of vane pumps. The spring pin type blade liquefied gas pump comprises a motor shell and a rotating shaft rotationally arranged in the motor shell, a connecting piece, a pump body and a pump cover are sequentially arranged on one side of the motor shell, an eccentric bushing is arranged in the pump body, a retainer capable of axially sliding is arranged on the rotating shaft and located in the eccentric bushing, a plurality of blades are arranged on the retainer in a sliding mode in the radial direction, and the rotating shaft is connected with the rotating shaft. An elastic component for assisting the blade to slide is arranged on the retainer; a first rubber sheet and a second rubber sheet are respectively arranged at two ends of the retainer and the blade; due to the arrangement of the elastic assembly, the situation that the retainer cannot work due to the low rotating speed is avoided, and the application range is wide; due to the sliding arrangement of the retainer and the arrangement of the rubber sheet, the friction between the retainer and the pump cover is reduced, and meanwhile, the retainer can be automatically adjusted on the rotating shaft; the rotating shaft directly penetrates through the pump body, so that a mechanical seal is omitted, and the problem that the mechanical seal is damaged due to idling is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vane pumps, in particular to a spring pin type vane liquefied gas pump. Background Art

[0002] The vane pump uses the volume change between two adjacent vanes installed in the rotor driven by the transmission shaft and the radial groove of the rotor to achieve oil suction and discharge. High pressure and low energy consumption are a major feature of modern industrial products. The high pressure of the vane pump depends on the life of the friction pair of the vane and the stator. Removing part of the load at the root of the blade and reducing the contact pressure of the blade on the inner curved surface of the stator is a high-pressure vane pump with various unloading forms.

[0003] The working principle of the vane pump is that when the retaining frame installed on the transmission shaft rotates, the blades sliding on the retaining frame are extended from the retaining frame by centrifugal force. After the blades are extended from the retaining frame, a closed space is formed between two adjacent blades. After the liquid enters the closed space, the liquid will be transmitted by the rotation of the blades. With the help of the structure of the eccentric bushing, when the two adjacent blades rotate to the minimum diameter of the eccentric bushing, the two blades retract, and the liquid stored between the two blades flows out, completing the principle of liquid transportation.

[0004] The blades on the existing vane pump are extended when working by the centrifugal force generated by the high-speed rotation of the retaining frame. When the retaining frame rotates at a low speed, the blades are extended to a small distance or even cannot be extended from the rotor. A closed space cannot be formed between two adjacent blades, and liquid transmission cannot be achieved. The above-mentioned structure of the blades on the retaining frame is only suitable for high-speed operation occasions. The retaining frame has poor use effect when it runs at a low speed and has a small range of use. The existing retaining frame is fixedly arranged on the rotating shaft. When the rotating shaft runs at a high speed, the rotor in the motor may drive the rotating shaft to move to one side through the magnetic field force. When the rotating shaft moves to one side, the retaining frame arranged on the rotating shaft may rub against the pump cover on one side, resulting in a large gap between the pump cover and the retaining frame. When the pump cover is worn, the closed space between the two adjacent blades will be damaged, and liquid is likely to flow out of the gap during operation, resulting in low transmission efficiency. In addition, a mechanical seal is arranged between the existing vane pump and the drive motor. The arrangement of the mechanical seal cannot make the drive motor and the vane pump run idle, and the idling of the vane pump is likely to cause damage to the mechanical seal. Utility Model Content

[0005] The utility model aims to provide a spring pin type blade liquefied gas pump, in which a spring is arranged between a retaining frame and a blade, thereby avoiding the reason that the retaining frame cannot work due to a low rotation speed, and having a wide range of uses; the retaining frame is slidably arranged on a rotating shaft, and rubber sheets are arranged at both ends of the retaining frame and the blade, thereby reducing the friction between the retaining frame and the pump cover and enabling the retaining frame to be automatically adjusted on the rotating shaft; the rotating shaft is directly passed through the pump body to cancel the mechanical seal, thereby avoiding the problem of damage to the mechanical seal due to idling.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spring pin type blade liquefied gas pump, comprising a motor housing and a rotating shaft rotatably arranged in the motor housing, a connecting piece, a pump body and a pump cover are arranged in sequence on one side of the motor housing, the rotating shaft passes through the connecting piece, the pump body and the pump cover in sequence, an eccentric bushing is arranged in the pump body, an axially slidable retaining frame is arranged on the rotating shaft and in the eccentric bushing, a plurality of blades are radially slidably arranged on the retaining frame, an elastic component for assisting the sliding of the blades is arranged on the retaining frame, and a first rubber sheet and a second rubber sheet are arranged at both ends of the retaining frame and the blades, respectively.

[0007] Preferably, a keyway is provided on the rotating shaft at one side away from the motor housing, and a spline matching the keyway is provided on the inner diameter of the retaining frame.

[0008] Preferably, the retaining frame is provided with a plurality of slide grooves, and blades cooperating with the slide grooves are embedded in the plurality of slide grooves. The retaining frame is provided with a plurality of slideways connected with the slide grooves, and a guide shaft cooperating with the slideway is fixedly provided at the bottom of the blade.

[0009] Preferably, the elastic component includes a groove, the groove is opened on the outside of the slide and is connected to the slide groove, a spring is arranged in the groove and on the outside of the slide and the guide shaft, and the spring is arranged between the retaining frame and the blade.

[0010] Preferably, a liquid inlet is transversely arranged on the outer side of the pump body, and a liquid outlet is longitudinally arranged on the outer side of the pump body.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, a plurality of blades are radially slidably arranged on the retaining frame, a guide shaft for sliding on the retaining frame is fixedly arranged at the bottom of the blade, and a spring for controlling the ejection of the blade is arranged at the bottom of the blade and on the outside of the guide shaft, thereby avoiding the existing phenomenon that the retaining frame cannot work due to the low rotation speed, being suitable for both high-speed rotation of the retaining frame and low-speed rotation of the retaining frame, and having a wide range of uses.

[0013] 2. In the utility model, the retainer is slidably arranged on the rotating shaft, so that the left-right position adjustment of the retainer on the rotating shaft can be realized, and the first rubber sheet and the second rubber sheet are respectively arranged at both ends of the retainer and the blade. The arrangement of the first rubber sheet and the second rubber sheet reduces the friction between the two ends of the retainer and the pump cover and the connecting piece respectively. When the retainer contacts the pump cover, the elasticity of the first rubber sheet can also make the retainer automatically adjust left-right on the rotating shaft, thereby avoiding the existing large gap caused by the friction between the retainer and the pump cover to affect the transmission efficiency of the liquid.

[0014] 3. In the utility model, the rotating shaft directly penetrates the pump body, a retaining frame is slidably arranged in the pump body and on the rotating shaft, the pump body and the motor housing are connected by a connecting piece, the existing mechanical seal assembly is eliminated, and the problem of damage to the mechanical seal due to idling is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the local decomposition structure;

[0017] Figure 3 For this utility model Figure 2 Schematic diagram of the local explosion structure;

[0018] Figure 4 For this utility model Figure 3 Schematic diagram of the local structure;

[0019] Figure 5 For this utility model Figure 4 Schematic diagram of the planar structure;

[0020] Figure 6 For this utility model Figure 4 Schematic diagram of the half-section structure of AA;

[0021] Figure 7 For this utility model Figure 4 Schematic diagram of the local decomposition structure.

[0022] In the figure:

[0023] 1-motor housing, 2-connecting piece, 3-pump body, 4-pump cover, 5-liquid inlet, 6-liquid outlet, 7-eccentric bushing, 8-rotating shaft, 9-keyway, 10-cage, 11-spline, 12-slideway, 13-blade, 14-slideway, 15-guide shaft, 16-groove, 17-spring, 18-first rubber sheet, 19-second rubber sheet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-7 As shown, a spring pin type vane liquefied gas pump comprises a motor housing 1, combined with Figure 1 , Figure 2 and Figure 3 As shown, a rotating shaft 8 is rotatably arranged in the motor housing 1, and a connecting member 2, a pump body 3 and a pump cover 4 are sequentially arranged on one side of the motor housing 1. The rotating shaft 8 passes through the connecting member 2, the pump body 3 and the pump cover 4 in sequence. Preferably, the pump body and the motor housing are connected by the connecting member 2, the existing mechanical seal assembly is eliminated, and the problem of damage to the mechanical seal due to idling is avoided. A liquid inlet 5 connected to the inner cavity is horizontally arranged on the outer side of the pump body 3, and a liquid outlet 6 connected to the inner cavity is longitudinally arranged on the outer side of the pump body 3.

[0026] Specifically in this embodiment, combined with Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an eccentric bushing 7 is fixedly provided in the pump body 3, and an axially slidable retainer 10 is provided on the rotating shaft 8 and located in the eccentric bushing 7. Furthermore, a keyway 9 is provided on the rotating shaft 8 and on the side away from the motor housing 1, and a spline 11 cooperating with the keyway 9 is provided on the inner diameter of the retainer 10. Preferably, the retainer 10 can realize left-right position adjustment on the rotating shaft 8, and a first rubber sheet 18 and a second rubber sheet 19 are respectively provided at both ends of the retainer 10 and the blades 13. The provision of the first rubber sheet 18 and the second rubber sheet 19 reduces the friction between the two ends of the retainer 10 and the pump cover 4 and the connecting member 2 respectively. When the retainer 10 contacts the pump cover 4, the elasticity of the first rubber sheet 18 can enable the retainer 10 to be automatically adjusted left-right on the rotating shaft 8, thereby avoiding the existing large gap caused by the friction between the retainer and the pump cover 4 to affect the transmission efficiency of the liquid.

[0027] Specifically in this embodiment, combined with Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the retainer 10 is provided with a plurality of blades 13 which are radially slidable. Further, the retainer 10 is provided with a plurality of slide grooves 12, and the plurality of slide grooves 12 are embedded with blades 13 which cooperate with the slide grooves 12. The retainer 10 is provided with a plurality of slideways 14 which are connected with the slide grooves 12. The bottom of the blade 13 is fixedly provided with a guide shaft 15 which cooperates with the slideway 14. The retainer 10 is provided with an elastic component which assists the blade 13 in sliding. Further, in combination with Figure 6 As shown, the elastic component includes a groove 16, and the groove 16 is opened on the outer side of the slide 14 and is connected with the slide groove 12. A spring 17 is arranged in the groove 16 and on the outer side of the slide 14 and the guide shaft 15. The spring 17 is arranged between the retaining frame 10 and the blade 13. When working, the blade 13 is slid out of the slide groove 12 with the help of the elastic force of the spring 17, so that the end of the blade 13 cooperates with the inner wall of the eccentric bushing 7. Preferably, the spring 17 is used to control the ejection of the blade 13, thereby avoiding the existing phenomenon of the retaining frame 10 not being able to work due to the low rotation speed. It is suitable for high-speed rotation of the retaining frame 10 and also suitable for low-speed rotation of the retaining frame 10, and has a wide range of uses.

[0028] Working principle:

[0029] When the rotating shaft 8 rotates, the retainer 10 is driven to rotate. Since an eccentric bushing 7 is provided on the outer side of the retainer 10, when the retainer 10 rotates, the blades 13 on the retainer 10 are extended or retracted. When the blades 13 are extended, a closed space is formed between two adjacent blades 13. When the two adjacent blades 13 are retracted, the liquid in the closed space is discharged to complete the transmission of the liquid. When the retainer 10 runs at a high speed, the retainer 10 may move to one side under the action of the magnetic field force. When the retainer 10 moves to one side, the first rubber sheet 18 on one side of the retainer 10 contacts the pump cover 4, and then the elastic force of the first rubber sheet 18 is used to move the retainer 10 to the side away from the pump cover 4, so that the first rubber sheet 18 on the other side of the retainer 10 contacts the connecting member 2, and then the elastic force of the first rubber sheet 18 contacts the retainer 10 to move to the side close to the pump cover 4. After several cycles, the retainer 10 automatically finds balance on the rotating shaft 8. When the first rubber sheet 18 is severely worn, it can be repaired by removing the pump cover 4. It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A spring pin type vane liquefied gas pump, comprising a motor housing (1) and a rotating shaft (8) rotatably arranged in the motor housing (1), characterized in that: A connecting piece (2), a pump body (3) and a pump cover (4) are sequentially arranged on one side of the motor housing (1); the rotating shaft (8) passes through the connecting piece (2), the pump body (3) and the pump cover (4) in sequence; an eccentric bushing (7) is arranged in the pump body (3); an axially slidable retainer (10) is arranged on the rotating shaft (8) and in the eccentric bushing (7); a plurality of blades (13) are radially slidably arranged on the retainer (10); an elastic component for assisting the blades (13) to slide is arranged on the retainer (10); and a first rubber sheet (18) and a second rubber sheet (19) are respectively arranged at both ends of the retainer (10) and the blades (13).

2. A spring pin type vane liquefied gas pump according to claim 1, characterized in that: A keyway (9) is provided on the rotating shaft (8) at a side away from the motor housing (1), and a spline (11) matching with the keyway (9) is provided on the inner diameter of the retaining frame (10).

3. A spring pin type vane liquefied gas pump according to claim 1, characterized in that: The retaining frame (10) is provided with a plurality of slide grooves (12), and blades (13) cooperating with the slide grooves (12) are embedded in the plurality of slide grooves (12). The retaining frame (10) is provided with a plurality of slideways (14) connected with the slide grooves (12), and a guide shaft (15) cooperating with the slideway (14) is fixedly provided at the bottom of the blade (13).

4. A spring pin type vane liquefied gas pump according to claim 3, characterized in that: The elastic component comprises a groove (16), the groove (16) being opened on the outside of the slideway (14) and communicating with the slide slot (12), a spring (17) being arranged in the groove (16) and located on the outside of the slideway (14) and the guide shaft (15), and the spring (17) being arranged between the retaining frame (10) and the blade (13).

5. The spring pin type vane liquefied gas pump according to claim 1, characterized in that: A liquid inlet (5) is disposed transversely on the outer side of the pump body (3), and a liquid outlet (6) is disposed longitudinally on the outer side of the pump body (3).

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