CN111720306A - Double-acting vane pump - Google Patents

Double-acting vane pump Download PDF

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Publication number
CN111720306A
CN111720306A CN202010607210.2A CN202010607210A CN111720306A CN 111720306 A CN111720306 A CN 111720306A CN 202010607210 A CN202010607210 A CN 202010607210A CN 111720306 A CN111720306 A CN 111720306A
Authority
CN
China
Prior art keywords
pin
double
vane pump
main shaft
hydraulic compensation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010607210.2A
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Chinese (zh)
Inventor
王金强
张明亮
雷德荣
高洪泉
高德峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dandong Natai Petroleum Machinery Co ltd
Original Assignee
Dandong Natai Petroleum Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dandong Natai Petroleum Machinery Co ltd filed Critical Dandong Natai Petroleum Machinery Co ltd
Priority to CN202010607210.2A priority Critical patent/CN111720306A/en
Publication of CN111720306A publication Critical patent/CN111720306A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3446Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • F04C2/3447Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface the vanes having the form of rollers, slippers or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005Removing contaminants, deposits or scale from the pump; Cleaning
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/008Pumps for submersible use, i.e. down-hole pumping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00

Abstract

The invention relates to a vane pump, in particular to a double-acting vane pump. The double-acting vane pump comprises a pump body, a main shaft, a rotor and a stator which are arranged in the pump body, and a hydraulic compensation device; a plurality of blade grooves are arranged on the rotor along the radial direction, and a blade is inserted in each blade groove; the rotor is sleeved on the main shaft and rotates along with the main shaft; a high-pressure oil inlet hole is axially formed in the main shaft; the hydraulic compensation device is arranged between the high-pressure oil inlet hole and each blade groove; the hydraulic compensation device pushes the blades to be abutted against the inner surface of the stator through the hydraulic action in the high-pressure oil inlet hole. The double-acting vane pump provided by the invention is ground conveying, oil extraction lifting equipment of an oil field and an oil well, and a wellhead drives the main shaft to rotate for oil extraction, so that the problem of low efficiency of the oil well pump caused by working shrinkage of an oil pumping rod string is solved.

Description

Double-acting vane pump
Technical Field
The invention relates to a vane pump, in particular to a double-acting vane pump.
Background
At present, the double-acting vane pump at home and abroad is only limited to be used at high revolution and small discharge capacity, and is not applied at high discharge capacity and low revolution capacity, because the suction cavity vanes and the inner surface of a stator are seriously abraded, so that the double-acting vane pump can not be applied to the field. At present, the reciprocating oil well pump used in the end of 70 years still accounts for 80% of the total amount of the lifting oil extraction equipment, has 100 years of history and a large-bottom-surface oil pumping unit, occupies a large bottom area, is restricted by a structure, bears alternating load, has large mechanical loss and is low in efficiency. Especially, the screw pump with serious gas injection and thermal gas production lock has been applied for more than 40 years, accounts for 10 percent of the total amount of oil production equipment, and can not be used in heavy oil and high-condensate thermal huff and puff wells so far, the screw pump stator is regarded as a rubber material, cannot resist high temperature, can only have the best application effect below 85 ℃, has a narrow application range, and has serious abrasion and short service life on the screw of a sand-containing large oil well. The centrifugal oil-submerged pump is mainly applied to a large-displacement thin oil well, cannot lift thick oil, has large one-time investment and is not easy to popularize in a large area.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a double acting vane pump to overcome the problem of low pumping pump efficiency caused by the operational contraction of the rod string.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-acting vane pump comprises a pump body, a main shaft, a rotor and a stator which are arranged in the pump body, and a hydraulic compensation device;
a plurality of blade grooves are formed in the rotor along the radial direction, and a blade is inserted into each blade groove;
the rotor is sleeved on the main shaft and rotates along with the main shaft; a high-pressure oil inlet hole is formed in the main shaft along the axial direction;
the hydraulic compensation device is arranged between the high-pressure oil inlet hole and each blade groove; and the hydraulic compensation device pushes the blades to be abutted against the inner surface of the stator under the action of hydraulic pressure in the high-pressure oil inlet hole.
The bottom of each blade groove is communicated with the central hole of the rotor through a pin hole I;
a plurality of pin holes II communicated with the high-pressure oil inlet hole are formed in the main shaft in the radial direction, are distributed in the circumferential direction and correspond to the pin holes I one by one respectively;
the hydraulic compensation device is accommodated in the pin hole I and the pin hole II and has freedom degree of axial movement.
The hydraulic compensation device comprises a pin;
one end of the pin is in sliding fit with the pin hole I and is abutted against the blade; the other end of the pin is in sliding fit with the pin hole II.
The hydraulic compensation device also comprises a fixed sleeve, and the fixed sleeve is arranged in the column pin hole I; the pin is in sliding fit with the fixed sleeve.
The pin is of a stepped shaft structure, the large-diameter end of the pin is in sliding fit with the pin hole II, and the small-diameter end of the pin is in sliding fit with the fixed sleeve.
And a hydraulic compensation cavity is arranged at the upper port of the high-pressure oil inlet and is communicated with the high-pressure oil inlet.
And a sand filtering device is arranged in the hydraulic compensation cavity, the sand filtering device comprises a sand filtering seat and a sand filter arranged on the sand filtering seat, and the sand filtering seat is arranged in a sinking hole at the upper port of the high-pressure oil inlet.
The main shaft is arranged in the pump body through an upper bearing part and a lower bearing part, a liquid inlet hole is formed in the lower bearing part, and a liquid outlet hole is formed in the upper bearing part;
the hydraulic compensation cavity is provided with a hydraulic compensation liquid inlet communicated with the liquid outlet hole.
An annular gap is formed between the rotor and the stator, a low-pressure double-oil-suction area and a high-pressure double-oil-suction area are arranged on two sides of the diameter of the annular gap, the low-pressure double-oil-suction area is communicated with the liquid inlet hole, and the high-pressure double-oil-suction area is communicated with the liquid outlet hole.
A plurality of sand discharge grooves are formed in the outer circumference of the rotor and distributed between every two adjacent blade grooves; the bottom of the blade groove is communicated with the sand discharge groove.
The invention has the advantages and beneficial effects that:
1. the double-acting vane pump provided by the invention is ground conveying, oil extraction lifting equipment of an oil field and an oil well, the well head drives the main shaft to rotate for oil extraction, the efficiency is high, and the electricity is saved by about 40-50% compared with that of an oil pumping well.
2. The double-acting vane pump provided by the invention is made of all-metal materials, can lift and convey thin oil, thick oil, high-condensation oil and the like, and is wide in application range, and the highest temperature can reach 350 ℃.
3. The invention can continuously inject gas without lifting a pump in high-temperature oil extraction of an oil field, saves the well repairing time and cost, improves the oil extraction efficiency and reduces the labor intensity of workers.
4. According to the double-acting vane pump, the vanes reciprocate radially under the action of the hydraulic pins to realize work, and the high-temperature oil extraction gas-containing oil well is not locked by gas.
5. According to the double-acting vane pump, the vanes are pushed by the hydraulic pins, the liquid in the high-pressure cavity does not enter the bottoms of the vanes in the low-pressure cavity, the front hydraulic pressure and the rear hydraulic pressure of the vanes in the low-pressure cavity are equal, the abutting friction force between the vanes and the inner surface of the stator is small, and the vanes and the inner surface of the stator are not abraded.
6. The double-acting vane pump has the advantages that the rotating moving parts are in clearance fit, the operation is stable, the pump efficiency is high, and the electricity is saved by 40-50% for the reciprocating oil well pump.
7. The vane pump of the invention is a reversible change of a double-acting pump, the pump rotates a circle to suck oil twice and discharge oil twice, compared with a single-acting pump vane pump, the vane pump of the double-acting pump has no radial force, reduces the abrasion of a sliding bearing and has long service life.
Drawings
FIG. 1 is a schematic structural view of a double acting vane pump of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic view of the structure of the rotor in the present invention.
Wherein: the device comprises a main shaft 1, a pump body 2, a fastening screw 3, a sand filter 4, a sand filter seat 5, a fastening nut 6, an anti-friction ring 7, an upper bearing seat 8, a locking screw 9, an upper sliding bearing 10, a blade 11, a high-pressure oil inlet hole 12, a rotor 13, a stator 14, a fixed sleeve 15, a pin 16, a flat key 17, a rotor dismounting hole 18, a pump body fixing pin 19, a lower bearing seat 20, a lower sliding bearing 21, a locking screw 22, a hole snap spring 23, a lower pump shaft 24, a blade groove 26, a pin hole I27, a pin hole II 28, a sand discharge groove 29, a liquid inlet hole 31, a liquid outlet hole 32, a hydraulic compensation cavity 33, a hydraulic compensation liquid inlet 34, a low-pressure oil suction area N, a high-pressure oil discharge area M and a rotary direction F.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the double-acting vane pump provided by the present invention comprises a pump body 2, a main shaft 1, a rotor 13, a stator 14 and a hydraulic compensation device, wherein the main shaft 1, the rotor 13, the stator 14 and the hydraulic compensation device are arranged in the pump body 2, the main shaft 1 is arranged in the pump body 2 through an upper bearing part and a lower bearing part, the lower bearing part is provided with a liquid inlet hole 31, and the upper bearing part is provided with a liquid outlet hole 32. The rotor 13 is sleeved on the main shaft 1 and rotates along with the main shaft 1; the stator 14 is fixedly connected with the inner wall of the pump body 2. The inner cavity of the stator 14 is elliptical, and an annular gap is formed between the rotor 13 and the stator 14, namely an annular space is formed by a large diameter and a small diameter; both sides of the diameter of the annular space are provided with a low-pressure double oil suction area N and a high-pressure double oil discharge area M, as shown in figure 2; the low-pressure double-oil suction area N is communicated with the liquid inlet hole 31, and the high-pressure double-oil suction area M is communicated with the liquid outlet hole 32.
In the embodiment of the present invention, as shown in fig. 2-3, the rotor 13 is provided with a plurality of vane slots 26 along the radial direction, each vane slot 26 is inserted with a vane 11, and the vane 11 can move along the radial direction; a high-pressure oil inlet hole 12 is axially arranged on the main shaft 1, and a hydraulic compensation device is arranged between the high-pressure oil inlet hole 12 and each blade groove 26; the hydraulic pressure compensating means pushes the vane 11 against the inner surface of the stator 14 by the hydraulic pressure in the high pressure oil inlet hole 12.
In the embodiment of the present invention, as shown in fig. 2 to 3, the bottom of each vane groove 26 is communicated with the central hole of the rotor 13 through a pin hole i 27; a plurality of pin holes II 28 communicated with the high-pressure oil inlet 12 are arranged on the main shaft 1 along the radial direction, and the pin holes II 28 are distributed along the circumferential direction and respectively correspond to the pin holes I27 one by one; the hydraulic compensation device is accommodated in the pin hole I27 and the pin hole II 28 and has freedom of movement in the axial direction.
In an embodiment of the invention, as shown in fig. 2, the hydraulic compensation device comprises a pin 16; one end of the pin 16 is in sliding fit with the pin hole I27 and is abutted with the blade 11; the other end of the pin 16 is in sliding fit with the pin hole ii 28.
Furthermore, the hydraulic compensation device also comprises a fixed sleeve 15, and the fixed sleeve 15 is arranged in the column pin hole I27; the pin 16 is a sliding fit with the fixed sleeve 15.
Specifically, the pin 16 is a stepped shaft structure, and the large diameter end thereof is in sliding fit with the pin hole ii 28, and the small diameter end thereof is in sliding fit with the fixed sleeve 15 and abuts against the blade 11. The high-pressure oil in the high-pressure oil inlet hole 12 pushes the bottom of the vane 11 through the pin 16, so that the vane 11 moves in the radial direction, and the vane 11 is always in abutment with the inner surface of the stator 14.
On the basis of the above embodiment, as shown in fig. 1, a hydraulic compensation cavity 33 and a sand filter accommodated in the hydraulic compensation cavity 33 are disposed at the upper port of the high-pressure oil inlet 12, and the hydraulic compensation cavity 33 is provided with a hydraulic compensation inlet 34 communicated with the liquid outlet 32.
In the embodiment of the invention, the sand filtering device comprises a sand filtering seat 5 and a sand filter 4 arranged on the sand filtering seat 5, wherein the sand filtering seat 5 is arranged in a sinking hole at the upper port of the high-pressure oil inlet 12. The sand filter 4 filters out the sundries in the hydraulic compensation cavity 33, prevents the sundries from entering the high-pressure oil inlet hole 12, and ensures that the pin 16 at the bottom of the rotor 13 freely moves in the radial direction.
On the basis of the above embodiment, as shown in fig. 3, a plurality of sand discharge grooves 29 are provided on the outer circumference of the rotor 13, and the sand discharge grooves 29 are distributed between two adjacent blade grooves 26; the bottom of the vane groove 26 communicates with a row of sand grooves 29.
In the embodiment of the present invention, as shown in fig. 1, the upper bearing component includes an upper sliding bearing 10 and an upper bearing seat 8, the upper bearing seat 8 is connected to the inner wall of the pump body 2, the upper sliding bearing 10 is sleeved on the main shaft 1 and connected to the upper bearing seat 8, and two liquid outlet holes 32 are symmetrically formed in the upper bearing seat 8. And a wear reducing component positioned above the upper sliding bearing 10 is arranged between the upper bearing seat 8 and the main shaft 1. The antifriction component comprises an antifriction ring 7, and the antifriction ring 7 is sleeved on the main shaft 1 and is arranged in a hole of the upper bearing seat 8.
In the embodiment of the invention, as shown in fig. 1, the lower bearing component includes a lower bearing seat 20 and a lower sliding bearing 21, the lower bearing seat 20 abuts against the inner wall of the pump body 2, the lower sliding bearing 21 is sleeved on the main shaft 1 and connected with the lower bearing seat 20, and two liquid inlet holes 31 are symmetrically arranged on the lower bearing seat 20.
As shown in fig. 2, two low-pressure oil suction areas N on both sides of a diameter of the annular space are symmetrically arranged, and two high-pressure oil discharge areas M are symmetrically arranged. The two liquid inlet holes 31 correspond to the two low-pressure oil suction areas N respectively, the two liquid outlet holes 32 correspond to the two high-pressure oil discharge areas M respectively, and liquid suction and liquid discharge are performed twice every revolution of the rotor 13. The bottom of the blade 11 in the low-pressure oil suction area N is pushed by the pin 16 to abut against the inner wall of the stator 14, high-pressure cavity liquid cannot enter the bottom of the blade 11, the pressure of the pin 16 abutting against the bottom of the blade 11 is reasonable, the contact pressure of the blade 11 and the inner wall of the stator 14 is small, and the blade 11 and the inner wall of the stator 14 are not abraded.
The working principle of the invention is as follows:
according to the double-acting vane pump provided by the invention, the main shaft 1 rotates to drive the rotor 13 to rotate clockwise through the flat key 17, the pins 16 at the bottom of the vane grooves 26 are under the action of high-pressure oil pressure in the high-pressure oil inlet hole 12, the vanes 11 always cling to the inner surface of the stator 14 to slide, and the contact pressure is small. The rotor 13 rotates from 0 degree to 90 degrees to form a low-pressure oil suction area N, and liquid in a high-pressure cavity cannot enter the bottom of the blade 11 in the low-pressure oil suction area N. In the low-pressure oil suction region N, the hydraulic pressure before and after the vane 11 is equal, and the vane 11 and the inner surface of the stator 14 are not abraded. Liquid enters the pump chamber from an inlet port 31 in the lower bearing housing 20. The rotor 13 rotates from 90 degrees to 180 degrees to form a high-pressure oil discharge area M, the front pressure and the rear pressure acting on the blades 11 are equal, and liquid enters the oil pipe from the liquid outlet 32 on the upper bearing seat 8. The rotor 13 rotates from 180 degrees to 270 degrees to form another low-pressure oil suction area N, and liquid enters the pump cavity from another liquid inlet 31 on the lower bearing seat 20. The rotor 13 rotates from 270 degrees to 360 degrees to form another high-pressure oil discharge area M, and liquid enters the oil pipe from another liquid outlet 32 on the upper bearing seat 8. And when the rotor rotates for one circle, oil absorption is performed twice, oil discharge is performed twice, the pump continuously operates, the low-pressure oil absorption area N continuously absorbs oil, the high-pressure oil discharge area M continuously discharges oil, and the liquid at the front section is discharged to the destination from the oil pipe.
According to the invention, high-pressure oil acts on the pin through the central hole of the main shaft, the pin pushes the blades to move radially in the blade grooves, the blades are always abutted against the inner wall of the stator, the thrust of the blades is very small by the pin, and the problems of too large thrust, serious abrasion, large leakage, low pump efficiency and short service life of the conventional high-pressure oil entering the bottom of the low-pressure cavity blade are solved.
The double-acting pump of the invention can generate different pressures according to the conveying distance, and the vane pump can be used in series in multiple stages, thereby improving the conveying pressure, reducing the wear of the pump and prolonging the service life of the pump. When the double-acting vane pump is combined in a multi-stage series mode, the shell of each stage of pump is in threaded connection and fixed in the radial direction, and the shafts are connected through spline sleeves.
The double-acting vane pump provided by the invention is made of all-metal materials, is driven by a motor and driven by an oil field wellhead to drive a main shaft to rotate, is suitable for thin oil, thick oil, high-condensation oil and high-temperature huff and puff wells, and has the highest temperature of 350 ℃. The double-acting blade can reciprocate in the radial direction in the working cavity of the pump, has automatic compensation and long service life, does not have air lock in a high-temperature gas-containing well, has reasonable design clearance value, operates stably, has high pump efficiency, saves electricity compared with a reciprocating oil-well pump, and is the most ideal conveying, oil extraction and lifting equipment at home and abroad. The invention ensures that the low-pressure cavity blade is not worn on the inner surface of the stator, is particularly applied to deep wells, thin oil wells and compact oil wells in petroleum extraction lifting equipment, and has the best effect of the submersible pump.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A double-acting vane pump comprises a pump body (2), a main shaft (1), a rotor (13) and a stator (14) which are arranged in the pump body (2), and is characterized by also comprising a hydraulic compensation device;
a plurality of blade grooves (26) are formed in the rotor (13) along the radial direction, and a blade (11) is inserted into each blade groove (26);
the rotor (13) is sleeved on the main shaft (1) and rotates along with the main shaft (1); a high-pressure oil inlet hole (12) is formed in the main shaft (1) along the axial direction;
the hydraulic compensation device is arranged between the high-pressure oil inlet hole (12) and each blade groove (26); the hydraulic compensation device pushes the blades (11) to be abutted against the inner surface of the stator (14) through the hydraulic action in the high-pressure oil inlet hole (12).
2. A double acting vane pump as claimed in claim 1, wherein the bottom of each vane slot (26) is connected to the central bore of the rotor (13) by a pin bore i (27);
a plurality of pin holes II (28) communicated with the high-pressure oil inlet hole (12) are formed in the main shaft (1) along the radial direction, and the pin holes II (28) are distributed along the circumferential direction and are respectively in one-to-one correspondence with the pin holes I (27);
the hydraulic compensation device is accommodated in the pin hole I (27) and the pin hole II (28) and has freedom degree of axial movement.
3. A double acting vane pump as claimed in claim 1, wherein the hydraulic compensation means comprises a pin (16);
one end of the pin (16) is in sliding fit with the pin hole I (27) and is abutted against the blade (11); the other end of the pin (16) is in sliding fit with the pin hole II (28).
4. A double acting vane pump as claimed in claim 3, wherein said hydraulic compensation means further comprises a retaining sleeve (15), said retaining sleeve (15) being disposed within said pin bore i (27); the pin (16) is in sliding fit with the fixed sleeve (15).
5. A double acting vane pump as claimed in claim 4, wherein the pin (16) is of stepped shaft configuration with a large diameter end in sliding engagement with the pin bore II (28) and a small diameter end in sliding engagement with the retaining sleeve (15).
6. A double acting vane pump as claimed in claim 1, characterized in that a hydraulic compensation chamber (33) is provided at the upper port of the high pressure oil inlet hole (12), the hydraulic compensation chamber (33) communicating with the high pressure oil inlet hole (12).
7. A double acting vane pump as claimed in claim 6, characterized in that a sand screen is provided in the hydraulic compensation chamber (33), the sand screen comprising a sand screen seat (5) and a sand screen (4) arranged on the sand screen seat (5), the sand screen seat (5) being arranged in a counterbore at the upper port of the high pressure oil inlet (12).
8. A double-acting vane pump according to claim 6, characterized in that said main shaft (1) is mounted in said pump body (2) by means of an upper bearing part and a lower bearing part, said lower bearing part being provided with a liquid inlet hole (31) and said upper bearing part being provided with a liquid outlet hole (32);
the hydraulic compensation cavity (33) is provided with a hydraulic compensation liquid inlet (34) communicated with the liquid outlet hole (32).
9. A double-acting vane pump according to claim 8, characterized in that an annular gap is formed between the rotor (13) and the stator (14), said annular gap being provided on both sides of a diameter with a low-pressure double suction area (N) communicating with the inlet hole (31) and a high-pressure double suction area (M) communicating with the outlet hole (32).
10. A double-acting vane pump according to claim 1, characterized in that the rotor (13) is provided on its outer circumference with a plurality of sand discharge slots (29), the sand discharge slots (29) being distributed between two adjacent vane slots (26); the bottom of the blade groove (26) is communicated with the sand discharge groove (29).
CN202010607210.2A 2020-06-30 2020-06-30 Double-acting vane pump Pending CN111720306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010607210.2A CN111720306A (en) 2020-06-30 2020-06-30 Double-acting vane pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010607210.2A CN111720306A (en) 2020-06-30 2020-06-30 Double-acting vane pump

Publications (1)

Publication Number Publication Date
CN111720306A true CN111720306A (en) 2020-09-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010607210.2A Pending CN111720306A (en) 2020-06-30 2020-06-30 Double-acting vane pump

Country Status (1)

Country Link
CN (1) CN111720306A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202833140U (en) * 2012-08-21 2013-03-27 浙江台州先顶液压有限公司 High-pressure vane pump
CN103089615A (en) * 2013-02-04 2013-05-08 孙国校 Leakage type high-pressure vane pump and its use method
CN105650234A (en) * 2016-02-06 2016-06-08 李钢 Hydraulic stepless speed change device and vane pump and vane motor thereof
CN106762614A (en) * 2017-01-16 2017-05-31 丹东纳泰石油机械有限公司 A kind of oil well recovers the oil and lifts double-acting vane pump
CN206458594U (en) * 2017-01-16 2017-09-01 丹东纳泰石油机械有限公司 Oil well, which recovers the oil, lifts single acting vane pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202833140U (en) * 2012-08-21 2013-03-27 浙江台州先顶液压有限公司 High-pressure vane pump
CN103089615A (en) * 2013-02-04 2013-05-08 孙国校 Leakage type high-pressure vane pump and its use method
CN105650234A (en) * 2016-02-06 2016-06-08 李钢 Hydraulic stepless speed change device and vane pump and vane motor thereof
CN106762614A (en) * 2017-01-16 2017-05-31 丹东纳泰石油机械有限公司 A kind of oil well recovers the oil and lifts double-acting vane pump
CN206458594U (en) * 2017-01-16 2017-09-01 丹东纳泰石油机械有限公司 Oil well, which recovers the oil, lifts single acting vane pump

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