Automatic control device for gap of fuel roller pump

Abstract

The invention relates to a fuel roller pump clearance automatic control device which comprises a pump body and an eccentric sleeve, the pump body is clamped by a fixing device, a sliding table air cylinder and a precise sliding table are arranged on the two sides of the fixing device respectively, and the precise sliding table pushes the eccentric sleeve to move through a rear positioning plate and makes contact with a rotor in the pump. After parameters collected by the pressure sensor reach set values, the precise sliding table drives the rear positioning plate to reversely move by the distance of a set gap and be locked, and the sliding table air cylinder drives the front positioning plate to push the eccentric sleeve to move and make the eccentric sleeve make contact with the rear positioning plate. By the adoption of the technical scheme, the eccentric sleeve makes contact with the rotor in the pump to be at the zero position, the precise sliding table moves reversely, the rear positioning plate is locked after precisely moving by the needed spacing distance, at the moment, the gap between the rear positioning plate and the eccentric sleeve is the needed set distance, and at the moment, the sliding table air cylinder is controlled to be started in the other direction; and the clearance adjustment is completed by pushing the eccentric sleeve to contact the rear positioning plate.

Description

Technical Field

[0001] The invention belongs to the technical field of roller pumps, and in particular relates to an automatic gap control device for a fuel roller pump. Background Art

[0002] The electric fuel roller pump requires precise control of the clearance between the pump's inner rotor and the pump's eccentric sleeve. To ensure the performance of the electric fuel roller pump, the pump's inner rotor must operate flexibly within the pump's eccentric sleeve and precisely match to ensure the pressure and flow generated under its working conditions. The assembly clearance size needs to be precisely guaranteed.

[0003] The existing assembly process is manual positioning and assembly, in which the pump eccentric sleeve and the pump inner rotor are first installed into the pump body, roughly positioned visually and then fixed with screws, a feeler gauge is inserted for inspection, the eccentric sleeve is manually tapped and moved back and forth to adjust the gap size, the feeler gauge is inserted again to feel the tightness, and this process is repeated many times until the feel meets the gap requirements of the assembly process. Therefore, the existing process technology ensures low precision and low efficiency. Summary of the invention

[0004] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides an automatic control device for the gap of a fuel roller pump, which solves the problem that the gap adjustment between the pump body and its eccentric sleeve requires manual positioning and adjustment, and the process precision is low and the efficiency is low.

[0005] The technical solution of the present invention is as follows: an automatic control device for the gap of a fuel roller pump comprises a pump body and an eccentric sleeve, wherein the pump body comprises an inner rotor and a fixed shaft, the eccentric sleeve is installed outside the inner rotor of the pump, the pump body is clamped by a fixing device, a slide cylinder and a precision slide are respectively provided on both sides of the fixing device, the slide cylinder and the precision slide respectively control the movements of a front positioning plate and a rear positioning plate, a pressure sensor is fixedly provided on the rear positioning plate, the precision slide pushes the eccentric sleeve to move and contact the inner rotor of the pump through the rear positioning plate, after the parameters collected by the pressure sensor reach the set value, the precision slide drives the rear positioning plate to move in the opposite direction by the set gap distance and locks it, the slide cylinder drives the front positioning plate to push the eccentric sleeve to move and contact the rear positioning plate.

[0006] By adopting the above technical scheme, the eccentric sleeve is pushed to move by the slide cylinder and the precision slide, and the pressure sensor is used as a detection tool. The pressure change is used to detect whether the eccentric sleeve contacts the inner rotor of the pump. The eccentric sleeve contacts the inner rotor of the pump as the zero position, and the precision slide moves in the opposite direction to accurately move the rear positioning plate to the required spacing distance and then lock it. At this time, the gap between the rear positioning plate and the eccentric sleeve is the required set distance. At this time, the slide cylinder is controlled to start in the other direction, and the eccentric sleeve is pushed to contact the rear positioning plate to complete the gap adjustment. Therefore, there is no need to manually adjust the eccentric sleeve on the pump body. It only needs to be placed on the fixing device and the movement of the precision slide is controlled to achieve the positioning of the eccentric sleeve.

[0007] The present invention is further configured such that the front positioning plate and the rear positioning plate both move linearly along the same horizontal direction.

[0008] The above further configuration ensures that the front and rear positioning plates move along the same horizontal plane and in the same straight line, so that the eccentric sleeve can contact the rear positioning plate along the moving direction of the rear positioning plate, avoiding the eccentric sleeve from shifting and causing inaccurate gaps.

[0009] A further configuration of the present invention is that the pressure sensor is arranged above the rear positioning plate, and when the eccentric sleeve contacts the inner rotor of the pump, the detection head of the pressure sensor contacts the fixed shaft.

[0010] With the above further arrangement, the fixed shaft and the pump body are fixedly arranged. After the pump body is fixed on the fixing device, the positions of the fixed shaft and the fixing device are relatively fixed. Thus, the pressure is detected by utilizing the contact between the pressure sensor and the fixed shaft. Compared with the gap error caused by setting the detection end between the rear positioning plate and the eccentric sleeve, the position of the pressure sensor on the rear positioning plate is adjusted through multiple tests, so that the contact between the rear positioning plate and the eccentric sleeve can be detected more accurately.

[0011] A further configuration of the present invention is that it also includes a plurality of limit blocks arranged above the eccentric sleeve, and the limit blocks and the eccentric sleeve are positioned and connected via a positioning core.

[0012] By adopting the above-mentioned further arrangement, a limit block is designed above the eccentric sleeve, so that the eccentric sleeve can be limited in the up and down directions, and the eccentric sleeve can be prevented from slightly moving upward during the pushing process, thereby ensuring the movement accuracy of the eccentric sleeve and making the gap between the eccentric sleeve and the rotor inside the pump more precise. The positioning core is inserted into the eccentric sleeve and the limit block to make them relatively fixed in the horizontal direction, thereby preventing the limit block from sliding in the horizontal direction relative to the eccentric sleeve and generating resistance, causing the eccentric sleeve to fail to move into place.

[0013] The present invention is further configured as follows: the front positioning plate and the rear positioning plate are both step structures, and both include an upper contact surface and a lower contact surface facing the eccentric sleeve, the upper contact surface is used to contact and push the limit block, and the lower contact surface is used to contact and push the eccentric sleeve.

[0014] By further adopting the above-mentioned arrangement, by arranging upper contact surfaces and lower contact surfaces on the front positioning plate and the rear positioning plate, each positioning plate can contact the eccentric sleeve and the limit block, and can push the eccentric sleeve and the limit block above it at the same time to prevent resistance and even wear caused by the relative sliding of the eccentric sleeve and the limit block, and further ensure the movement accuracy of the eccentric sleeve.

[0015] The present invention is further configured as follows: the fixing device comprises a positioning flange and a plurality of positioning claws, the positioning flange is provided with a positioning opening for placing the pump body, and the positioning claws clamp the pump body at the side.

[0016] By adopting the above further arrangement, the pump body can be positioned and fixed, the pump body can be prevented from sliding when the eccentric sleeve is pushed, and the end surface of the eccentric sleeve can be controlled to be arranged horizontally.

[0017] A further configuration of the present invention includes an automatic screw locking machine. After the slide cylinder drives the front positioning plate to push the eccentric sleeve to contact the rear positioning plate, the automatic screw locking machine uses screws to lock the eccentric sleeve and the pump body.

[0018] With the above further arrangement, after the gap between the eccentric sleeve and the pump body is adjusted into place, the programmable controller is used to control the linked automatic screw locking machine to lock the screws on the eccentric sleeve and the pump body. At this time, the eccentric sleeve is limited by the front positioning plate and the rear positioning plate. Even if it is affected by the vibration of the screw being screwed in, its position does not change, so that the distance between the eccentric sleeve and the pump body after being completely fixed is more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the clearance adjustment between the eccentric sleeve and the inner rotor of the pump in the present invention; Figure 3 It is a schematic diagram of the overall structure of the second embodiment of the present invention.

[0020] In the figure: 1. Pump body; 2. Eccentric sleeve; 3. Fixing device; 31. Positioning flange; 4. Slide cylinder; 5. Precision slide; 6. Front positioning plate; 7. Rear positioning plate; 8. Pressure sensor; 9. Detection head; 10. Limit block; 11. Pump inner rotor; 12. Fixed axis; 13. Positioning core; 14. Upper contact surface; 15. Lower contact surface. DETAILED DESCRIPTION

[0021] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0022] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by those skilled in the art. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention. Embodiment 1

[0024] like Figure 1-2 As shown, an automatic control device for the clearance of a fuel roller pump comprises a pump body 1 and an eccentric sleeve 2, wherein the pump body 1 comprises a pump inner rotor 11 and a fixed shaft 12, wherein the fixed shaft 12 is fixedly arranged in a horizontal position relative to the pump body 1, and the eccentric sleeve 2 is installed on the periphery of the pump inner rotor 11, and the pump body 1 is clamped by a fixing device 3, wherein the fixing device 3 adopts a three-claw cylinder, comprising a positioning flange 31 and three positioning claws arranged at equal angles, wherein a positioning opening 33 for placing the pump body 1 is arranged in the positioning flange 31, and the positioning claws clamp the pump body 1 at the side, thereby ensuring the positioning and fixing of the pump body 1, preventing the pump body 1 from sliding when the eccentric sleeve 2 is pushed, and controlling the end face of the eccentric sleeve 2 to be arranged horizontally.

[0025] A slide cylinder 4 and a precision slide 5 are respectively provided on both sides of the fixing device 3. In this embodiment, the precision slide 5 uses a servo-electrically controlled precision slide, which can accurately control the sliding distance. The fixing device 3, the slide cylinder 4 and the precision slide 5 are all supported by a base or a support plate to adjust the height. The slide cylinder 4 and the precision slide 5 respectively control the front positioning plate 6 and the rear positioning plate 7 to move linearly along the same horizontal direction, and the front positioning plate 6 and the rear positioning plate 7 are both located above the top surface of the fixing device 3 and aligned with the eccentric sleeve 2, and can be contacted and pushed.

[0026] A pressure sensor 8 is fixedly arranged above the rear positioning plate 7. In this embodiment, the pressure sensor 8 is a diaphragm-type pressure sensor. The detection head 9 of the pressure sensor 8 can be in contact with the fixed shaft 12. Whether the pressure sensor 8 is in contact with the fixed shaft 12 is determined by judging the detection parameters of the pressure sensor 8. The adjustment process is as follows: The precision slide 5 pushes the eccentric sleeve 2 to move through the rear positioning plate 7 so that it contacts the inner rotor 11 of the pump. After the eccentric sleeve 2 contacts the inner rotor 11 of the pump, the detection head 9 of the pressure sensor 8 contacts the fixed shaft 12 to detect pressure. The test parameter of the pressure sensor 8 reaches the set value and is set to zero at this time. After that, the precision slide 5 drives the rear positioning plate 7 in the reverse direction to move the set gap distance and locks it. The slide cylinder 4 drives the front positioning plate 6 to push the eccentric sleeve 2 to move and contact the rear positioning plate 7. At this time, the eccentric sleeve 2 and the pump body 1 are locked with screws, and then the slide cylinder 4 and the precision slide 5 are reset. The fixing device 3 to the pump body 1 is loosened, and the pump body 1 is taken out to complete the gap adjustment.

[0027] Among them, since the pump body 1 is fixed on the fixing device 3, the position of the fixed shaft 12 and the fixing device 3 is relatively fixed, and the pressure is detected by utilizing the contact between the pressure sensor 8 and the fixed shaft 12. Compared with the gap error caused by setting the detection end between the rear positioning plate 7 and the eccentric sleeve 2, the position of the pressure sensor 8 on the rear positioning plate 7 is adjusted through multiple tests, so that the contact between the rear positioning plate 7 and the eccentric sleeve 2 can be detected more accurately.

[0028] In this embodiment, an automatic screw locking machine is also included. After the slide cylinder 4 drives the front positioning plate 6 to push the eccentric sleeve 2 to contact the rear positioning plate 7, the automatic screw locking machine uses screws to lock the eccentric sleeve 2 and the pump body 1.

[0029] After the gap between the eccentric sleeve 2 and the pump body 1 is adjusted to the right position, the programmable controller is used to control the linkage automatic screw locking machine to lock the screws on the eccentric sleeve 2 and the pump body 1. At this time, the eccentric sleeve 2 is limited by the front positioning plate 6 and the rear positioning plate 7. Even if it is affected by the vibration of the screw being screwed in, its position will not change, so that the distance between the eccentric sleeve 2 and the pump body 1 after being completely fixed is more precise.

[0030] Specifically, in this embodiment, the eccentric sleeve 2 is pushed to move by the slide cylinder 4 and the precision slide 5, and the pressure sensor 8 is used as a detection tool. The pressure change is used to detect whether the eccentric sleeve 2 contacts the inner rotor 11 of the pump. The eccentric sleeve 2 contacts the inner rotor 11 of the pump as the zero position, and the precision slide 5 reverses to move the rear positioning plate 7 precisely to the required spacing distance and then locks it. At this time, the gap between the rear positioning plate 7 and the eccentric sleeve 2 is the required set distance. At this time, the slide cylinder 4 is controlled to start in the other direction to push the eccentric sleeve 2 to contact the rear positioning plate 7 to complete the gap adjustment. Therefore, there is no need to manually adjust the eccentric sleeve 2 on the pump body. It only needs to be placed on the fixing device 3 and the precision slide 5 is controlled to move to achieve the positioning of the eccentric sleeve 2. Embodiment 2

[0031] This embodiment is based on embodiment 1. Figure 2~3 As shown, a limit block 10 is arranged above the eccentric sleeve 2. In this embodiment, the limit blocks 10 are evenly arranged on the front and rear sides of the eccentric sleeve 2. The limit block 10 and the eccentric sleeve 2 are positioned and connected by a positioning core 13. The positioning core 13 makes it relatively fixed in the horizontal direction to prevent the limit block 10 from sliding in the horizontal direction relative to the eccentric sleeve 2 to generate resistance and cause the eccentric sleeve 2 to not move into place. By designing the limit block 10 above the eccentric sleeve 2, the eccentric sleeve 2 can be limited in the up and down directions to prevent the eccentric sleeve 2 from slightly moving upward during the pushing process, thereby ensuring the movement accuracy of the eccentric sleeve 2 and making the gap between the eccentric sleeve 2 and the rotor 11 inside the pump more precise.

[0032] The front positioning plate 6 and the rear positioning plate 7 are both step structures, and both include an upper contact surface 14 and a lower contact surface 15 facing the eccentric sleeve 2. The upper contact surface 14 is used to contact and push the limit block 10, and the lower contact surface 15 is used to contact and push the eccentric sleeve 2. Thus, each positioning plate can contact the eccentric sleeve 2 and the limit block 10, and can push the eccentric sleeve 2 and the limit block 10 above it at the same time to prevent resistance or even wear caused by the relative sliding of the eccentric sleeve 2 and the limit block 10, and further ensure the movement accuracy of the eccentric sleeve 2.

Claims

1. A fuel roller pump clearance automatic control device, comprising a pump body (1) and an eccentric sleeve (2), wherein the pump body (1) comprises a pump inner rotor (11) and a fixed shaft (12), and the eccentric sleeve (2) is mounted on the outer ring of the pump inner rotor (11), characterized in that: The pump body (1) is clamped by a fixing device (3). A slide cylinder (4) and a precision slide (5) are respectively provided on both sides of the fixing device (3). The slide cylinder (4) and the precision slide (5) respectively control the movement of a front positioning plate (6) and a rear positioning plate (7). A pressure sensor (8) is fixedly provided on the rear positioning plate (7). The precision slide (5) pushes the eccentric sleeve (2) to move and contact the inner rotor (11) of the pump through the rear positioning plate (7). After the pressure sensor (8) detects that the parameter reaches a set value, the precision slide (5) drives the rear positioning plate (7) to move in the opposite direction by a set gap distance and locks it. The slide cylinder (4) drives the front positioning plate (6) to push the eccentric sleeve (2) to move and contact the rear positioning plate (7).

2. The fuel roller pump clearance automatic control device according to claim 1, characterized in that: The front positioning plate (6) and the rear positioning plate (7) both move in the same horizontal direction.

3. The fuel roller pump clearance automatic control device according to claim 1, characterized in that: The pressure sensor (8) is arranged above the rear positioning plate (7), and when the eccentric sleeve (2) contacts the pump inner rotor (11), the detection head (9) of the pressure sensor (8) contacts the fixed shaft (12).

4. The fuel roller pump clearance automatic control device according to claim 1, characterized in that: It also includes a plurality of limit blocks (10) arranged above the eccentric sleeve (2), wherein the limit blocks (10) and the eccentric sleeve (2) are connected in a positioning manner via a positioning core (13).

5. The fuel roller pump clearance automatic control device according to claim 4, characterized in that: The front positioning plate (6) and the rear positioning plate (7) are both step structures, and both include an upper contact surface (14) and a lower contact surface (15), wherein the upper contact surface (14) is used to contact and push the limit block (10), and the lower contact surface (15) is used to contact and push the eccentric sleeve (2).

6. The fuel roller pump clearance automatic control device according to claim 1, characterized in that: The fixing device (3) comprises a positioning flange (31) and a plurality of positioning claws. The positioning flange (31) is provided with a positioning opening (33) for placing the pump body (1). The positioning claws clamp the pump body (1) at the side.

7. The fuel roller pump clearance automatic control device according to claim 1, characterized in that: It also includes an automatic screw locking machine. After the slide cylinder (4) drives the front positioning plate (6) to push the eccentric sleeve (2) to contact the rear positioning plate (7), the automatic screw locking machine locks the eccentric sleeve (2) and the pump body (1).

Images