Combined stable duplex gear pump

Abstract

The utility model discloses a combined stable duplex gear pump, which relates to the technical field of duplex gear pumps, and comprises a pump body, a power input end of the pump body is connected with a power input shaft, the power input shaft is connected with a pump body shell through a bearing, the pump body is connected with a lubrication box through a sliding mechanism, and the lubrication box is connected with the pump body through a bearing. An oil pumping mechanism used for providing lubricating oil for the bearing is arranged in the lubricating box and comprises an oil cylinder fixed to the outer side of the lubricating box, the oil inlet end of the oil cylinder is communicated with a first oil conveying pipe, the other end of the first oil conveying pipe is communicated with an oil storage tank, and the oil storage tank is arranged at the upper end of the interior of the lubricating box. An oil outlet is formed in the lower end of the oil storage tank. The oil pumping mechanism combined on the pump body is used for oiling and lubricating the bearing at the power input end of the gear pump, so that the duplex gear pump can stably operate for a long time, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of double gear pumps, in particular to a combined stable double gear pump. Background Art

[0002] A double gear pump is generally composed of a large-displacement low-pressure gear pump and a small-displacement high-pressure gear pump, which can achieve efficient suction of fluids. However, the existing double gear pumps still have some shortcomings. When the existing double gear pumps are in operation, the bearings at the power input end will be subject to a large load. If they run for a long time, the bearings may have performance degradation or even burnt due to insufficient lubrication, which will have a great impact on production efficiency.

[0003] Based on this, a combined stable double gear pump is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0004] The utility model aims to provide a combined stable double gear pump to solve the problems in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A combined stable double gear pump comprises a pump body, wherein a power input end of the pump body is connected to a power input shaft, and the power input shaft is connected to a pump body shell through a bearing.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional solution: the pump body and the lubrication box are connected via a sliding mechanism, and an oil pumping mechanism for providing lubricating oil to the bearing is provided inside the lubrication box.

[0009] In an optional solution: the oil pumping mechanism includes an oil cylinder fixed on the outside of the lubrication box, the oil inlet end of the oil cylinder is connected to the first oil pipe, the other end of the first oil pipe is connected to the oil storage tank, the oil storage tank is arranged at the upper end position inside the lubrication box, the lower end of the oil storage tank is provided with an oil outlet, the top of the oil storage tank is provided with an oil tank cover, the oil outlet end of the oil cylinder is connected to the second oil pipe, the first oil pipe is provided with an oil inlet check valve for one-way oil inlet, the second oil pipe is provided with an oil outlet check valve for one-way oil outlet, and the other end of the second oil pipe is connected to the lower oil guide hole The lower oil guide hole is connected with the oil storage chamber, the oil storage chamber is connected with the upper oil guide hole, the oil storage chamber is connected with the bearing, the top of the upper oil guide hole is provided with an oil outlet hole, a piston is slidably fitted inside the oil cylinder, the outer side of the piston is connected with the piston connecting rod, the outer end of the piston connecting rod is connected with the top head, the cylinder mouth is connected with the cylinder cover, a through hole is provided in the middle position of the side of the cylinder cover, the piston connecting rod passes through the through hole on the side of the cylinder cover, a connecting rod spring is provided between the top head and the cylinder cover, and a transmission component for intermittently pushing the top head to move is provided inside the lubrication box.

[0010] In an optional scheme: the transmission assembly includes a first rotating shaft and a second rotating shaft rotatably connected to the inside of the lubrication box, the second rotating shaft and the first rotating shaft are parallel to the power input shaft, the second rotating shaft is arranged above the first rotating shaft, and a first driven large gear and a driven small gear are coaxially provided on the first rotating shaft, a power input gear is coaxially provided at a position corresponding to the first driven large gear on the power input shaft, a second driven large gear and a power output cam are coaxially provided on the second rotating shaft, the second driven large gear is meshed with the driven small gear, the power output cam is in contact with the top head, and the outer side of the lubrication box is connected to a pressing unit for driving it to slide up and down. In an initial state, the first driven large gear and the power input gear are in a separated state. Under the action of the pressing unit, the power input gear and the first driven large gear are in contact to complete power transmission.

[0011] In an optional scheme: the pressing unit includes a fixed seat arranged on the outside of the pump body, a spring fixing column is provided at the right end of the fixed seat, the spring fixing column is connected to one end of the pull rod spring, the other end of the pull rod spring is connected to a through hole, a second sliding groove is provided on the pull rod where the through hole is located, the second sliding groove is slidably connected to the fixed column, the fixed column is connected to the outside of the lubrication box, the pull rod is rotatably connected to the pull rod shaft, and the pull rod shaft is fixed between the upper end of the fixed seat and the pump body casing.

[0012] In an optional solution: the sliding mechanism includes a first sliding groove arranged on the pump shell of the pump body, and the lubrication box shell is provided with a sliding rail matching the first sliding groove.

[0013] In an optional solution, the center position of the right side surface of the head is in sliding contact with the outer curved surface of the power output cam.

[0014] In an optional solution: the lower end of the lubrication box is of open design.

[0015] In an optional solution: a groove is provided on the lower end surface of the spring fixing column.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The utility model drives the lubrication box connected to the pump body through the sliding mechanism to slide downward through the downward pressure unit, so that the transmission component contacts the power input shaft, and the transmission component drives the oil cylinder to work. The oil cylinder delivers the lubricating oil to the lubrication cavity at the bearing position through the second oil delivery pipe and the lower oil guide hole, so as to lubricate the bearing at the power input end of the double gear pump, so that the double gear pump can operate continuously and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 For this utility model Figure 1 A partial enlarged view of B.

[0020] Figure 3 It is a schematic diagram of the sliding mechanism structure of the utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the transmission component of the utility model.

[0022] Figure 5 For this utility model Figure 4 A partial enlarged view of middle A.

[0023] Figure 6 It is a structural schematic diagram of the oil cylinder of the utility model.

[0024] Reference numerals: 100, lubrication box; 101, power input gear; 102, first driven large gear; 103, driven small gear; 104, second driven large gear; 105, power output cam; 106, second rotating shaft; 107, first rotating shaft; 200, oil cylinder; 201, piston; 202, piston connecting rod; 203, connecting rod spring; 204, top; 205, oil inlet check valve; 206, oil outlet check valve; 207, first oil pipeline; 208, second oil pipeline; 209, oil pump; 210, oil pump; 211, oil pump; 212, oil pump; 213, oil pump; 214, oil pump; 215, oil pump; 216, oil pump; 217, oil pump; 218, oil pump; 219, oil pump; 220, oil pump; 221, oil pump; 222, oil pump; 223, oil pump; 224, oil pump; 225, oil pump; 226, oil pump; 227, oil pump; 228, oil pump; 229, oil pump; 230, oil pump; 231, oil pump; 232, oil pump; 233, oil pump; 234, oil pump; 235, oil pump; 236, oil pump; 237, oil pump; 238, oil pump; 239, oil pump; 240, oil pump; 241, oil pump; 242, oil pump; 243, oil pump; 244, oil pump; 245, oil pump; 246, oil pump; 247, oil pump; 248, oil pump; 249, oil pump; 250, oil pump; 251, oil pump; 252, oil 9. Lower oil guide hole; 210. Upper oil guide hole; 211. Oil storage chamber; 212. Oil outlet hole; 213. Cylinder head; 300. Oil storage tank; 301. Oil outlet; 302. Oil tank cover; 400. Fixed seat; 401. Spring fixing column; 402. Tie rod shaft; 403. Tie rod; 404. Fixed column; 405. Second slide groove; 406. Tie rod spring; 407. First slide groove; 408. Slide rail; 409. Perforation; 500. Pump body; 501. Bearing; 502. Power input shaft. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0026] In one embodiment, Figure 1-Figure 6 As shown, a combined stable double gear pump includes a pump body 500, wherein the power input end of the pump body 500 is connected to a power input shaft 502, and the power input shaft 502 is connected to the outer shell of the pump body 500 through a bearing 501;

[0027] In this embodiment, the pump body 500 and the lubrication box 100 are connected via a sliding mechanism, and an oil pumping mechanism for providing lubricating oil to the bearing 501 is provided inside the lubrication box 100;

[0028] In one embodiment, Figure 4-Figure 6As shown, the oil pump mechanism includes an oil cylinder 200 fixed on the outside of the lubrication box 100, the oil inlet end of the oil cylinder 200 is connected to the first oil delivery pipe 207, the other end of the first oil delivery pipe 207 is connected to the oil storage tank 300, the oil storage tank 300 is arranged at the upper end of the lubrication box 100, the lower end of the oil storage tank 300 is provided with an oil outlet 301, the top of the oil storage tank 300 is provided with an oil tank cover 302, the oil outlet end of the oil cylinder 200 is connected to the second oil delivery pipe 208, the first oil delivery pipe 207 is provided with an oil inlet check valve 205 for one-way oil inlet, and the second The oil delivery pipe 208 is provided with an oil outlet check valve 206 for one-way oil outlet. The other end of the second oil delivery pipe 208 is connected to the lower oil guide hole 209, and the lower oil guide hole 209 is connected to the oil storage chamber 211, and the oil storage chamber 211 is connected to the upper oil guide hole 210, and the oil storage chamber 211 is connected to the bearing 501. The top of the upper oil guide hole 210 is provided with an oil outlet hole 212. A piston 201 is slidably matched inside the oil cylinder 200, and the outer side of the piston 201 is connected to the piston connecting rod 202, and the outer end of the piston connecting rod 202 is connected to the head 204. 00 cylinder port is connected to the oil cylinder cover 213, the oil cylinder cover 213 has a through hole in the middle of the side, the piston connecting rod 202 passes through the through hole in the side of the oil cylinder cover 213, a connecting rod spring 203 is provided between the top head 204 and the oil cylinder cover 213, and a transmission component for intermittently pushing the top head 204 to move is provided inside the lubrication box 100, the transmission component intermittently pushes the top head 204, the top head 204 moves together with the piston connecting rod 202 and the piston 201 into the oil cylinder 200, compressing the space in the cylinder, and squeezing the lubricating oil into the second oil delivery pipe under the action of the oil inlet check valve 205 208, the lubricating oil enters the oil storage chamber 211 through the second oil delivery pipe 208 and the lower oil guide hole 209, the lubricating oil in the oil storage chamber 211 contacts the bearing 501, and plays a lubricating effect, the excess lubricating oil enters the upper oil guide hole 210 from the oil storage chamber 211 under the action of oil pressure, and is discharged through the oil outlet hole 212 at the top of the upper oil guide hole 210, after the oil cylinder 200 presses out the lubricating oil once, under the action of the connecting rod spring 203, the piston 201 is reset and under the action of the oil outlet check valve 206, the lubricating oil is sucked from the oil storage tank 300 into the oil cylinder 200 through the first oil delivery pipe 207;

[0029] In one embodiment, Figure 4As shown, the transmission assembly includes a second rotating shaft 106 and a first rotating shaft 107 which are rotatably connected to the inside of the lubrication box 100, the second rotating shaft 106 and the first rotating shaft 107 are parallel to the power input shaft 502, the second rotating shaft 106 is arranged above the first rotating shaft 107, a first driven large gear 102 and a driven small gear 103 are coaxially arranged on the first rotating shaft 107, a power input gear 101 is coaxially arranged at a position corresponding to the first driven large gear 102 on the power input shaft 502, a second driven large gear 104 and a power output cam 105 are coaxially arranged on the second rotating shaft 106, and the second driven large gear 104 is coaxially arranged with the driven small gear 103. The power output cam 105 is meshed, and is in contact with the top head 204. The outer side of the lubrication box 100 is connected to a pressing unit for driving it to slide up and down. In the initial state, the first driven large gear 102 and the power input gear 101 are in a separated state. Under the action of the pressing unit, the power input gear 101 and the first driven large gear 102 are in contact, and the power input gear 101 drives the first driven large gear 102 to rotate, and the first driven large gear 102 drives the second driven large gear 104 to rotate through the driven small gear 103, and the second driven large gear 104 drives the power output cam 105 to rotate through the second rotating shaft 106, thereby realizing intermittent pushing of the top head 204.

[0030] In one embodiment, Figure 1 and Figure 2 As shown, the pressing unit includes a fixing seat 400 arranged on the outside of the pump body 500, a spring fixing column 401 is provided at the right end of the fixing seat 400, the spring fixing column 401 is connected to one end of a pull rod spring 406, the other end of the pull rod spring 406 is connected to a through hole 409, a second slide groove 405 is provided on the pull rod 403 where the through hole 409 is located, the second slide groove 405 is slidably connected to the fixing column 404, the fixing column 404 is connected to the outside of the lubrication box 100, the pull rod 403 is rotatably connected with the pull rod shaft 402, and the pull rod shaft 402 is fixed between the upper end of the fixing seat 400 and the outer shell of the pump body 500. In the initial state, the pull rod 403 is in a lifted state under the pulling force of the pull rod spring 406. By pressing the pull rod 403 downward, the pull rod 403 rotates around the pull rod shaft 402, and the second slide groove 405 on the pull rod 403 generates a downward force on the fixed column 404 on the lubrication box 100. With the participation of the sliding mechanism, the lubrication box 100 slides downward;

[0031] In one embodiment, Figure 3 As shown, the sliding mechanism includes a first slide groove 407 provided on the pump housing of the pump body 500, and a slide rail 408 matching the first slide groove 407 is provided on the outer shell of the lubrication box 100, so that the lubrication box 100 can slide smoothly in the vertical direction of the pump body 500;

[0032] In one embodiment, Figure 6 As shown, the center position of the right side surface of the top head 204 is in sliding contact with the outer curved surface of the power output cam 105, so that the thrust received by the top head 204 can be more concentrated in the horizontal direction, thereby improving the smoothness of the piston 201 during movement. Example

[0033] In one embodiment, Figure 6 As shown, the lower end of the lubrication box 100 is open-type, and the lubrication box 100 will not interfere with the rotation of the power input shaft 502 when sliding upward;

[0034] In one embodiment, Figure 2 As shown, a groove is provided on the lower end surface of the spring fixing column 401 to prevent the pull rod spring 406 and the spring fixing column 401 from falling off during use.

[0035] The above embodiment discloses a combined stable double gear pump, in which in the initial state, the first driven large gear 102 and the power input gear 101 are in a separated state, and the oil pumping mechanism does not work at this time. When the pull rod 403 is pulled down, the pull rod 403 drives the lubrication box 100 to slide downward, and the first driven large gear 102 is meshed with the power input gear 101. A part of the power of the power input shaft 502 is transmitted to the power output cam 105 through the transmission assembly. When the power output cam 105 rotates, it can intermittently push the head 204, and the head 204 moves together with the piston connecting rod 202 and the piston 201 into the oil cylinder 200, and at the same time compresses the connecting rod spring 203. The lubricating oil inside the oil cylinder 200 is only The lubricating oil can enter the oil storage chamber 211 through the second oil delivery pipe 208 and the lower oil guide hole 209. The lubricating oil in the oil storage chamber 211 contacts the bearing 501 to achieve a lubricating effect. The excess lubricating oil is discharged through the oil outlet hole 212 at the top of the upper oil guide hole 210. During the intermittent period of the thrust of the power output cam 105, the piston 201 is reset under the action of the connecting rod spring 203, and under the action of the oil outlet one-way valve 206 on the second oil delivery pipe 208, the oil cylinder 200 can only draw lubricating oil from the oil storage tank 300 through the first oil delivery pipe 207. This reciprocating cycle can achieve the effect of lubricating the bearing 501. When the pull rod 403 is released, under the action of the pull rod spring 406, the lubrication box 100 slides upward, and the first driven large gear 102 and the power input gear 101 are in a separated state again, and the lubrication is completed.

[0036] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A combined stable double gear pump, comprising a pump body (500), wherein a power input end of the pump body (500) is connected to a power input shaft (502), and the power input shaft (502) is connected to a housing of the pump body (500) via a bearing (501). It is characterized in that The pump body (500) and the lubrication box (100) are connected via a sliding mechanism, and an oil pumping mechanism for providing lubrication oil to the bearing (501) is provided inside the lubrication box (100).

2. A combined stable double gear pump according to claim 1, It is characterized in that The oil pump mechanism comprises an oil cylinder (200) fixed on the outside of the lubrication box (100); an oil inlet end of the oil cylinder (200) is in communication with a first oil delivery pipe (207); the other end of the first oil delivery pipe (207) is in communication with an oil storage tank (300); the oil storage tank (300) is arranged at the upper end of the lubrication box (100); an oil outlet (301) is provided at the lower end of the oil storage tank (300); an oil tank cover (302) is provided at the top of the oil storage tank (300); an oil outlet end of the oil cylinder (200) is in communication with a second oil delivery pipe (208); an oil inlet check valve (205) for one-way oil inlet is provided in the first oil delivery pipe (207); an oil outlet check valve (206) for one-way oil outlet is provided in the second oil delivery pipe (208); the other end of the second oil delivery pipe (208) is in communication with a lower oil guide hole (209); the lower oil guide hole (209) is in communication with a The oil storage chamber (211) is connected to an upper oil guide hole (210), the oil storage chamber (211) is connected to a bearing (501), an oil outlet hole (212) is provided at the top of the upper oil guide hole (210), a piston (201) is slidably matched inside the oil cylinder (200), the outer side of the piston (201) is connected to a piston connecting rod (202), the outer end of the piston connecting rod (202) is connected to a top head (204), the cylinder mouth of the oil cylinder (200) is connected to a cylinder cover (213), a through hole is provided at the middle position of the side of the cylinder cover (213), the piston connecting rod (202) passes through the through hole on the side of the cylinder cover (213), a connecting rod spring (203) is provided between the top head (204) and the oil cylinder cover (213), and a transmission component for intermittently pushing the top head (204) to move is provided inside the lubrication box (100).

3. A combined stable double gear pump according to claim 2, It is characterized in that The transmission assembly comprises a second rotating shaft (106) and a first rotating shaft (107) which are rotatably connected to the inside of the lubrication box (100); the second rotating shaft (106) and the first rotating shaft (107) are parallel to the power input shaft (502); the second rotating shaft (106) is arranged above the first rotating shaft (107); a first driven large gear (102) and a driven small gear (103) are coaxially arranged on the first rotating shaft (107); a power input gear (101) is coaxially arranged at a position on the power input shaft (502) corresponding to the first driven large gear (102); and the second rotating shaft A second driven large gear (104) and a power output cam (105) are coaxially arranged on (106); the second driven large gear (104) is meshed with the driven small gear (103); the power output cam (105) is in contact with the top head (204); the outer side of the lubrication box (100) is connected to a downward pressing unit for driving it to slide up and down; in an initial state, the first driven large gear (102) and the power input gear (101) are in a separated state; under the action of the downward pressing unit, the power input gear (101) and the first driven large gear (102) are in contact to complete power transmission.

4. A combined stable double gear pump according to claim 3, It is characterized in that The pressing unit comprises a fixing seat (400) arranged on the outside of the pump body (500), a spring fixing column (401) is provided at the right end of the fixing seat (400), the spring fixing column (401) is connected to one end of a pull rod spring (406), the other end of the pull rod spring (406) is connected to a through hole (409), a second slide groove (405) is provided on the pull rod (403) where the through hole (409) is located, the second slide groove (405) is slidably connected to the fixing column (404), the fixing column (404) is connected to the outside of the lubrication box (100), the pull rod (403) is rotatably connected to the pull rod shaft (402), and the pull rod shaft (402) is fixed between the upper end of the fixing seat (400) and the outer shell of the pump body (500).

5. A combined stable double gear pump according to claim 1, It is characterized in that The sliding mechanism comprises a first sliding groove (407) provided on a pump casing of a pump body (500), and a sliding rail (408) matching the first sliding groove (407) is provided on an outer casing of the lubrication box (100).

6. A combined stable double gear pump according to claim 2, It is characterized in that The center position of the right side surface of the top head (204) is in sliding contact with the outer curved surface of the power output cam (105).

7. A combined stable double gear pump according to claim 3, It is characterized in that The lower end of the lubrication box (100) is of open design.

8. A combined stable double gear pump according to claim 4, It is characterized in that The lower end surface of the spring fixing column (401) is provided with a groove.

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