CN209990628U - Through shaft type duplex piston pump - Google Patents
Through shaft type duplex piston pump Download PDFInfo
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- CN209990628U CN209990628U CN201920402149.0U CN201920402149U CN209990628U CN 209990628 U CN209990628 U CN 209990628U CN 201920402149 U CN201920402149 U CN 201920402149U CN 209990628 U CN209990628 U CN 209990628U
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- connecting piece
- guide rod
- recess
- pump
- intermediate connecting
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Abstract
The utility model relates to the field of pumps and discloses a through shaft type duplex piston pump.A first intermediate connecting piece and a second intermediate connecting piece are oppositely arranged on a transmission shaft, the outer end parts of the first intermediate connecting piece and the second intermediate connecting piece are fixedly connected with pistons, the two pistons are respectively arranged in pump bodies at corresponding ends, a curved guide rail is fixed at the inner end part of each pump body, and a channel is formed between two adjacent curved guide rails; a first guide rod and a second guide rod are fixed in the middle of the transmission shaft along the radial direction, the first middle connecting piece is connected with the first guide rod, the second middle connecting piece is connected with the second guide rod, rollers are mounted on the first middle connecting piece and the second middle connecting piece, and all the rollers move along the channel. The traditional transmission shaft and the plunger are designed integrally, namely, the piston can change the volume of the containing cavity and transmit power. The volume of the whole pump is greatly reduced, the interior of the pump becomes more compact, the space utilization rate is greatly improved, and the miniaturization development of the axial plunger pump is realized.
Description
Technical Field
The utility model relates to a pump field especially relates to a lead to shaft type pair piston pump.
Background
The traditional axial plunger pump is limited by the working principle of the axial plunger pump, each plunger can only realize oil absorption and oil discharge once when the transmission shaft rotates for a circle, and the displacement of the axial plunger pump is limited to a certain extent. In addition, the structure has more relative moving parts, high requirements on material quality and processing precision, sensitivity to oil pollution, and high requirements and cost on processing, use and maintenance; the pump body 15 rotates along with the transmission shaft, and the rotational inertia is large, so that the response speed of starting, stopping and speed regulation is low, and the control of the output flow of the pump by the speed regulation is not facilitated; the sliding friction pair in the pump body 15 is more, and the pump body 15 is heated up faster and abraded more rapidly under high-speed rotation, which directly affects the performance and service life of the pump.
The inside relative motion part of traditional column type stopper fuel pump is more, and is required highly to material, machining precision, for example application number: 201721397809.8, patent name: the novel duplex fuel pump is sensitive to oil pollution, and has higher requirements and cost for processing, using and maintaining and high price; the pump body 15 rotates along with the transmission shaft, and the rotational inertia is large, so that the response speed of starting, stopping and speed regulation is low, and the control of the output flow of the pump by the speed regulation is not facilitated; the pump body 15 has more friction pairs, the temperature rise of the pump body 15 is faster under high-speed rotation, and the service life of the pump is directly influenced by the abrasion of parts such as a valve plate, a plunger and the like. In addition, due to the limitation of the working principle of the plunger pump, the transmission shaft rotates for a circle, each plunger can only realize oil absorption and oil discharge once, and the design requirement of large flow is not easily met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the shortcoming of the life-span of pump among the prior art low, poor stability, provide a lead to shaft type pair piston pump.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
a through shaft type double-linkage piston pump comprises a transmission shaft, wherein a first intermediate connecting piece, a second intermediate connecting piece, pistons, curved guide rails and a pump body are arranged on the transmission shaft, the first intermediate connecting piece and the second intermediate connecting piece are oppositely arranged on the transmission shaft, the outer end parts of the first intermediate connecting piece and the second intermediate connecting piece are fixedly connected with the pistons, the two pistons are respectively arranged in the pump bodies at the corresponding ends, the curved guide rails are fixed at the inner end part of each pump body, and a channel is formed between every two adjacent curved guide rails; a first guide rod and a second guide rod are fixed in the middle of the transmission shaft in the radial direction, an included angle between the central axis of the first guide rod and the central axis of the second guide rod is not less than 30 degrees and not more than 60 degrees, needle roller bearings are installed at two ends of the first guide rod and the second guide rod, a first intermediate connecting piece is connected with the first guide rod, a second intermediate connecting piece is connected with the second guide rod, rollers are installed on the first intermediate connecting piece and the second intermediate connecting piece, and all the rollers move along the channel.
The traditional transmission shaft and the plunger are designed integrally, namely, the piston can change the volume of the containing cavity and transmit power. The piston and the pump body are coaxial, and the oil distribution disc structure of the traditional axial plunger pump is replaced by a double-motion-degree-of-freedom (2D) structure which can axially slide while the piston rotates, so that the continuous oil suction and discharge function is realized, the volume of the whole pump is greatly reduced, the interior of the pump becomes more compact, the space utilization rate is greatly improved, and the miniaturization development of the axial plunger pump is realized. And because of the advantages of small volume and light weight, the composite material can be applied to the field of aerospace.
Preferably, the first intermediate connecting piece is provided with two first grooves with the same opening direction and the symmetrical arrangement, the needle roller bearings at the two ends of the first guide rod are respectively and correspondingly limited in the first grooves on the first intermediate connecting piece, the second intermediate connecting piece is provided with second grooves with the same opening direction and the symmetrical arrangement, and the second grooves are used for limiting the needle roller bearings on the first guide rod and are arranged opposite to the first grooves.
The transmission shaft rotates and drives the first guide rod to rotate, the first guide rod is limited in the first groove and drives the first intermediate connecting piece to rotate, and the first intermediate connecting piece drives the roller to move in the channel, so that the first intermediate connecting piece drives the piston to rotate in the pump body and move up and down. The second groove on the second intermediate connecting piece provides a moving space for the needle roller bearing on the first guide rod, and interference is prevented when the piston moves up and down in the pump body.
Preferably, the second intermediate connecting piece is provided with two third grooves with the same opening direction and the symmetrical arrangement, the needle roller bearings at the two ends of the second guide rod are respectively and correspondingly limited in the third grooves on the second intermediate connecting piece, the first intermediate connecting piece is provided with fourth grooves with the same opening direction and the symmetrical arrangement, and the fourth grooves are used for limiting the needle roller bearings on the second guide rod and are arranged opposite to the third grooves.
The transmission shaft rotates and drives the second guide rod to rotate, the second rod is limited in the third groove and drives the second intermediate connecting piece to rotate, and the second intermediate connecting piece drives the roller to move in the channel, so that the second intermediate connecting piece drives the piston to rotate in the pump body and move up and down. The fourth groove on the first intermediate connecting piece provides a moving space for the needle roller bearing on the second guide rod, and interference is prevented when the piston moves up and down in the pump body.
Preferably, one end of the first middle connecting piece is symmetrically fixed with first convex blocks, the first convex blocks are all fixed with first fixing rods, the first fixing rods are provided with idler wheels, the second middle connecting piece is provided with fifth grooves, the opening directions of the fifth grooves are the same, the fifth grooves are symmetrically arranged, and the fifth grooves are used for limiting the first convex blocks.
First lug and first dead lever make things convenient for people to install the gyro wheel, and when first intermediate junction spare removed, the fifth recess on the second intermediate junction spare provided the removal space for first lug, guaranteed that the piston reciprocated in the pump body.
Preferably, a second bump is symmetrically fixed at one end of the second middle connecting piece, a second fixing rod is fixed on each second bump, a roller is also installed on each second fixing rod, sixth grooves with the same opening direction and symmetrically arranged are formed in the first middle connecting piece, and the sixth grooves are used for limiting the second bumps.
The second lug and the second fixed rod facilitate people to install the roller, and when the second middle connecting piece moves, the sixth groove in the first middle connecting piece provides a moving space for the second lug, so that the piston is guaranteed to move up and down in the pump body.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect:
the traditional transmission shaft and the plunger are designed integrally, namely, the piston can change the volume of the containing cavity and transmit power. The piston and the pump body are coaxial, and the oil distribution disc structure of the traditional axial plunger pump is replaced by a double-motion-degree-of-freedom (2D) structure which can axially slide while the piston rotates, so that the continuous oil suction and discharge function is realized, the volume of the whole pump is greatly reduced, the interior of the pump becomes more compact, the space utilization rate is greatly improved, and the miniaturization development of the axial plunger pump is realized. And because of the advantages of small volume and light weight, the composite material can be applied to the field of aerospace.
Drawings
Fig. 1 is a schematic sectional structure diagram of the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 without the housing.
Fig. 3 is a schematic view of the structure of fig. 2 without the pump body.
Fig. 4 is a schematic structural view of the propeller shaft and its upper part of fig. 2.
Fig. 5 is a schematic view of the structure of the first intermediate connector of fig. 3.
Fig. 6 is a schematic view of the second intermediate connecting member of fig. 3.
Fig. 7 is a schematic oil distribution diagram of the pump body and piston.
The names of the parts indicated by the numerical references in the above figures are as follows: the device comprises a transmission shaft 10, a first middle connecting piece 11, a second middle connecting piece 12, a piston 13, a curved guide rail 14, a pump body 15, a first guide rod 16, a second guide rod 17, a needle bearing 18, a roller 19, a channel 100, a first groove 111, a fourth groove 112, a first lug 113, a first fixing rod 114, a sixth groove 115, a second groove 121, a third groove 122, a fifth groove 123, a second lug 124 and a second fixing rod 125.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1-7 and examples.
Example 1
A through shaft type duplex piston pump comprises a transmission shaft 10, wherein a first middle connecting piece 11, a second middle connecting piece 12, a piston 13, a curved guide rail 14 and a pump body 15 are installed on the transmission shaft 10, the first middle connecting piece 11 and the second middle connecting piece 12 are oppositely arranged on the transmission shaft 10, the outer end portions of the first middle connecting piece 11 and the second middle connecting piece 12 are fixedly connected with the piston 13 through a pin shaft, the first middle connecting piece 11, the second middle connecting piece 12 and the piston 13 move synchronously, the two pistons 13 are respectively installed in the pump body 15 at the corresponding ends, four grooves (e, f, g and h) are formed in the outer circumferential surface of the piston 13, oil suction grooves, oil suction windows (a and c), an oil discharge groove and oil discharge windows (b and d) are formed in the pump body 15, the oil suction windows are communicated with the oil suction grooves, and the oil discharge windows are communicated with the oil discharge grooves. When the piston moves to the leftmost end, the grooves e, f, g, h on the piston do not communicate with the windows a, b, c, d on the pump body 15. When the piston 13 starts moving to the right end while rotating, the grooves e, f, g, h on the piston 13 communicate with the windows a, d, b, c on the pump body 15, respectively. The left cavity with the gradually-increased cavity absorbs oil from the oil tank through the communication channels e-a and h-c due to self-absorption; the right cavity with the gradually reduced volume extrudes the oil in the cavity through the communication channels f-d and g-b. When the piston 13 moves to the rightmost end, the grooves e, f, g, h on the piston 13 are not communicated with the windows a, b, c, d on the pump body 15. When the piston 13 continues to rotate, the piston 13 starts to move leftwards, and the right cavity starts to absorb oil from the oil tank through the communication channels f-a and g-c; the left lumen extrudes oil through communication channels e-b, h-d. A curved guide rail 14 is fixed at the inner end of each pump body 15, and a channel 100 is formed between every two adjacent curved guide rails 14; a first guide rod 16 and a second guide rod 17 are fixed in the middle of the transmission shaft 10 along the radial direction, an included angle between a central axis of the first guide rod 16 and a central axis of the second guide rod 17 is 30 degrees, needle bearings 18 are mounted at two ends of the first guide rod 16 and the second guide rod 17, the first intermediate connecting piece 11 is connected with the first guide rod 16, the second intermediate connecting piece 12 is connected with the second guide rod 17, rollers 19 are mounted on the first intermediate connecting piece 11 and the second intermediate connecting piece 12, and all the rollers 19 move along the channel 100.
The first intermediate connecting piece 11 is provided with two first grooves 111 with the same opening direction and symmetrically arranged, the needle roller bearings 18 at the two ends of the first guide rod 16 are respectively limited in the first grooves 111 on the first intermediate connecting piece 11 correspondingly, the second intermediate connecting piece 12 is provided with second grooves 121 with the same opening direction and symmetrically arranged, and the second grooves 121 are used for limiting the needle roller bearings 18 on the first guide rod 16 and are arranged opposite to the first grooves 111.
The second intermediate connecting member 12 is provided with two third grooves 122 with the same opening direction and symmetrically arranged, the needle roller bearings 18 at the two ends of the second guide rod 17 are respectively limited in the third grooves 122 on the second intermediate connecting member 12 correspondingly, the first intermediate connecting member 11 is provided with fourth grooves 112 with the same opening direction and symmetrically arranged, and the fourth grooves 112 are used for limiting the needle roller bearings 18 on the second guide rod 17 and are arranged opposite to the third grooves 122.
The second middle connecting piece 12 has a second protrusion 124 symmetrically fixed to one end thereof, the second protrusion 124 is fixed to a second fixing rod 125, the second fixing rod 125 is also provided with a roller 19, the first middle connecting piece 11 is provided with a sixth groove 115 with the same opening direction and symmetrically arranged, and the sixth groove 115 is used for limiting the second protrusion 124.
Example 2
Embodiment 2 has substantially the same features as embodiment 1 except that the angle between the central axis of the first guide bar 16 and the central axis of the second guide bar 17 in embodiment 2 is 45 degrees
Example 3
Embodiment 3 has substantially the same features as embodiment 1 except that the angle between the central axis of the first guide bar 16 and the central axis of the second guide bar 17 in embodiment 3 is 60 degrees
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.
Claims (5)
1. A through shaft type duplex piston pump comprises a transmission shaft (10), wherein a first intermediate connecting piece (11), a second intermediate connecting piece (12), a piston (13), curved guide rails (14) and pump bodies (15) are installed on the transmission shaft (10), the first intermediate connecting piece (11) and the second intermediate connecting piece (12) are oppositely arranged on the transmission shaft (10), the outer end parts of the first intermediate connecting piece (11) and the second intermediate connecting piece (12) are fixedly connected with the piston (13), the two pistons (13) are respectively installed in the pump bodies (15) at the corresponding ends, the inner end part of each pump body (15) is fixedly provided with the curved guide rail (14), and a channel (100) is formed between every two adjacent curved guide rails (14); the method is characterized in that: a first guide rod (16) and a second guide rod (17) are fixed in the middle of the transmission shaft (10) along the radial direction, an included angle between a central axis of the first guide rod (16) and a central axis of the second guide rod (17) is more than or equal to 30 degrees and less than or equal to 60 degrees, needle bearings (18) are installed at two ends of the first guide rod (16) and the second guide rod (17), a first middle connecting piece (11) is connected with the first guide rod (16), a second middle connecting piece (12) is connected with the second guide rod (17), rollers (19) are installed on the first middle connecting piece (11) and the second middle connecting piece (12), and all the rollers (19) move along the channel (100).
2. A through-shaft twin piston pump as defined in claim 1, wherein: be equipped with two openings towards first recess (111) the same and symmetry setting on first intermediate junction spare (11), needle bearing (18) at first guide arm (16) both ends correspond respectively and spacing in first recess (111) on first intermediate junction spare (11), are equipped with opening towards the same and symmetry setting second recess (121) on second intermediate junction spare (12), and second recess (121) are used for spacing needle bearing (18) on first guide arm (16) and set up with first recess (111) relatively.
3. A through-shaft twin piston pump as defined in claim 1, wherein: be equipped with two opening orientations and third recess (122) the same and symmetry setting on second intermediate junction spare (12), needle bearing (18) at second guide arm (17) both ends correspond respectively and spacing in third recess (122) on second intermediate junction spare (12), are equipped with opening orientation and the same and symmetry setting fourth recess (112) on first intermediate junction spare (11), and fourth recess (112) are used for spacing needle bearing (18) on second guide arm (17) and set up with third recess (122) relatively.
4. A through-shaft twin piston pump as defined in claim 1, wherein: first lug (113) are fixed with to first intermediate junction spare (11) one end symmetry, all are fixed with first dead lever (114) on first lug (113), install gyro wheel (19) on first dead lever (114), are equipped with on second intermediate junction spare (12) and open towards the same and symmetry fifth recess (123) that set up, and fifth recess (123) are used for spacing first lug (113).
5. A through-shaft twin piston pump as defined in claim 1, wherein: second lug (124) are fixed with to second intermediate junction spare (12) one end symmetry, all are fixed with second dead lever (125) on second lug (124), also install gyro wheel (19) on second dead lever (125), are equipped with sixth recess (115) that the opening orientation is the same and the symmetry sets up on first intermediate junction spare (11), and sixth recess (115) are used for spacing second lug (124).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402149.0U CN209990628U (en) | 2019-03-27 | 2019-03-27 | Through shaft type duplex piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402149.0U CN209990628U (en) | 2019-03-27 | 2019-03-27 | Through shaft type duplex piston pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209990628U true CN209990628U (en) | 2020-01-24 |
Family
ID=69290356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920402149.0U Expired - Fee Related CN209990628U (en) | 2019-03-27 | 2019-03-27 | Through shaft type duplex piston pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209990628U (en) |
-
2019
- 2019-03-27 CN CN201920402149.0U patent/CN209990628U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200124 Termination date: 20210327 |