CN113464511B - Bimetal oil distributing cover - Google Patents
Bimetal oil distributing cover Download PDFInfo
- Publication number
- CN113464511B CN113464511B CN202110734505.0A CN202110734505A CN113464511B CN 113464511 B CN113464511 B CN 113464511B CN 202110734505 A CN202110734505 A CN 202110734505A CN 113464511 B CN113464511 B CN 113464511B
- Authority
- CN
- China
- Prior art keywords
- oil
- friction pair
- oil distributing
- distributing cover
- cover
- 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.)
- Active
Links
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000013011 mating Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 11
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 10
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000005121 nitriding Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The disclosure provides a bimetal oil distributing cover, which comprises an oil distributing cover base body part and a friction pair pairing part used for being in pairing connection with a rotor friction pair, wherein the friction pair pairing part is fixedly connected with the oil distributing cover base body part; the oil distributing cover base body part is made of alloy materials. The hydraulic pump has the advantages of light weight, high strength, good economy and the like, and can be suitable for high-pressure use occasions to improve the comprehensive efficiency of the hydraulic pump.
Description
Technical Field
The disclosure relates to the field of oil distributing covers, in particular to a bimetal oil distributing cover.
Background
The hydraulic pump and the hydraulic motor are respectively used as a power element and an executing element of the hydraulic system and play an important role in the hydraulic system. The oil distributing cover is one of indispensable component parts in the hydraulic motor and the hydraulic pump, and is used for butting with an interface of a hydraulic system user, absorbing oil in oil distribution in the hydraulic pump and the hydraulic motor and discharging oil, and more importantly, the oil distributing cover is a main high-pressure stressed part in the hydraulic pump and the hydraulic motor, so that the oil distributing cover is required to have high strength and rigidity on one hand, and is required to have good wear resistance on the other hand, and is matched with a friction pair material formed by the rotor; at present, the oil distributing cover is generally made of a nitriding steel material, and meanwhile, the requirements of strength and friction pair material pairing are met, but the steel material is heavy under the same volume due to the fact that the density of the steel material is high.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
In order to solve at least one of the above technical problems, the present disclosure provides a bimetal oil distributing cover, and a specific implementation manner:
The bimetal oil distributing cover comprises an oil distributing cover base body part and a friction pair pairing part used for being in pairing connection with a rotor friction pair, wherein the friction pair pairing part is fixedly connected with the oil distributing cover base body part; the oil distributing cover base body part is made of alloy materials.
In one embodiment, the friction pair mating portion is made of a high strength wear resistant metallic material.
In one embodiment, the alloy material is a titanium alloy material.
In one embodiment, the friction pair mating portion and the oil distribution cover base portion are connected by hot isostatic diffusion welding.
In one embodiment, the oil distribution cover base portion includes a boss portion for connection with the housing; the friction pair mating part is connected to the table top of the boss part.
In one embodiment, the high strength wear resistant metallic material is a nitrided steel material.
In one embodiment, the outer peripheral wall of the boss portion is provided with a groove extending along the circumferential direction thereof, and a seal ring is embedded in the groove.
In one embodiment, the boss portion has a circular cross section.
In one embodiment, the oil distributing cover is provided with a high-pressure window, a low-pressure window, an oil inlet and an oil outlet; the oil inlet and the oil outlet are arranged on the oil distributing cover body part; the high-pressure window penetrates through the friction pair pairing part and the oil distributing cover base body part to be communicated with the oil outlet; the low-pressure window penetrates through the friction pair pairing part and the oil distributing cover base body part to be communicated with the oil inlet.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a schematic structural view of a bimetallic oil distribution cap of the present disclosure;
FIG. 2 is a schematic view of an assembly of a steel unitary oil distribution cap with a housing;
FIG. 3 is a schematic view of an assembly of a split oil distribution cover and a housing;
FIG. 4 is a schematic illustration of the assembly of a bimetallic oil distribution cap with a housing;
In the figure:
An oil distributing cover 1; a housing 2; a rotor 3; a seal ring 4; a positioning pin 5; a high pressure window 6; a low pressure window 7; an oil inlet 8; an oil outlet 9; a base portion 11 of the oil distribution cover; a friction pair mating part 12; a boss portion 111; a groove 112; an oil distribution cover main body 101; an oil distribution tray 102.
Detailed Description
The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.
In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Currently, the oil distribution cover generally includes an oil distribution cover of a unitary structure and an oil distribution cover of a split structure.
Fig. 2 shows an assembly schematic of the oil separating cover and the shell of a steel integral structure, which is generally manufactured integrally by using a nitriding steel material to meet the requirement of strength and friction pair pairing, but the oil separating cover of the structure has heavy weight under the condition of equal volume due to high steel density.
Referring to fig. 2, when the oil distributing cover adopting the steel integral structure is assembled, the oil distributing cover 1 and the shell 2 are fastened and installed by adopting screws, the rotor 3 in the shell is contacted with the oil distributing cover 1 to form friction pair pairing, the sealing ring 4 is used for sealing the oil distributing cover and the shell so as to prevent the leakage of oil in the cavity of the hydraulic pump, and the oil distributing cover adopting the steel integral structure can directly form friction pair pairing with the rotor.
Fig. 3 shows an assembly schematic diagram of an oil distribution cover and a shell of a split structure, the oil distribution cover of the split structure generally adopts a mode of adding an oil distribution cover main body 101 and an oil distribution disc 102, the oil distribution disc 102 is processed by utilizing nitriding steel so as to meet the matching requirement of friction pairs, the oil distribution cover main body 101 is manufactured by utilizing aluminum metal materials so as to reduce the weight of the oil distribution cover, then the oil distribution disc 102 is fixed on the oil distribution cover main body 101 in a bolt and other modes, and the oil distribution cover can meet the matching requirements of light weight and friction pairs at the same time, but has insufficient strength, cannot meet the high-pressure use condition, and easily causes the problems of internal leakage and the like.
Referring to fig. 3, when the split oil distribution cover is assembled, the split oil distribution cover main body 101 and the casing 2 are fastened and mounted by screws, the seal ring 4 is used for sealing the split oil distribution cover 1 and the casing 2, the leakage of oil in the hydraulic pump cavity is prevented, the oil distribution disc 102 is required to be added between the split oil distribution cover main body 101 and the rotor 3, the friction pair is formed by the oil distribution disc 102 and the rotor 3, and the oil distribution disc positioning is required to be performed between the oil distribution disc 102 and the split oil distribution cover main body 101 by the positioning pin 5.
Referring to fig. 1, as an embodiment, the present embodiment provides a bimetal oil distributing cover, which includes an oil distributing cover base portion 11 and a friction pair mating portion 12 for mating connection with a rotor friction pair, wherein the friction pair mating portion 12 is fixedly connected with the oil distributing cover base portion 11; the oil distributing cover base body 11 is made of an alloy material, and the friction pair mating part 12 is made of a high-strength wear-resistant metal material. The alloy material used for manufacturing the oil distributing cover base body 11 has the characteristics of high hardness and low weight, and alloy materials such as titanium alloy, aluminum alloy and the like are selected so as to have higher strength-weight ratio and meet the requirement of high-pressure stress of the oil distributing cover; the material used to make the friction pair mating portion should be a high strength wear resistant metal material, such as steel nitride, to meet the requirements for friction pair mating. As a preferred embodiment, the friction pair mating part 12 and the oil distribution cap base part 11 are connected by hot isostatic diffusion welding so that the friction pair mating part 12 and the oil distribution cap base part 11 can be joined integrally.
Referring to fig. 1, the bimetal oil distributing cover structure of the embodiment can solve the strength problem of the oil distributing cover under the condition of maintaining the original size of the oil distributing cover unchanged, meets the requirements of high strength and wear resistance of friction pair pairing, greatly reduces the weight of the oil distributing cover, and can also solve the problems of internal leakage and the like caused by a split structure of a single wall surface.
Referring to fig. 1, in the structure of the double metal oil distribution cap of the present embodiment, when the titanium alloy is used to manufacture the oil distribution cap base portion 11, the tensile strength of the titanium alloy material-made oil distribution cap base portion 11 is substantially similar to that of the steel material, but the density is only 1/2 of that of the steel material, and therefore, compared with the oil distribution cap of the steel-made integral structure, the oil distribution cap of the present embodiment has a higher strength-to-weight ratio, which is almost 2 times that of the steel material, after the titanium alloy material is used to manufacture the oil distribution cap base portion 11, and the weight of the double metal oil distribution cap of the present embodiment is reduced by 50% compared with that of the steel-made integral structure under the same tensile strength condition.
In addition, since the tensile strength of the titanium alloy is 3 to 4 times that of the aluminum metal material and the density is only about 1.6 times that of the aluminum metal material, the titanium alloy used as the oil distribution cover base 11 in this embodiment has a higher strength to weight ratio than the aluminum metal material, which is almost 2.5 times that of the aluminum alloy; therefore, the titanium alloy material is adopted as the oil distributing cover base body part 11, compared with the oil distributing cover made of aluminum metal material, when the weight of the oil distributing cover is increased by 50%, the tensile strength of the oil distributing cover can be improved by 2-3 times, the working pressure level of the hydraulic pump can be improved, the current 21MPa is improved to 28MPa, 35MPa or even higher, the pressure of the hydraulic system is improved, the diameter of the hydraulic system actuating cylinder can be greatly reduced, and the weight of the whole system is reduced.
Compared with the split-type oil distribution cover shown in fig. 3, the bimetallic oil distribution cover shown in fig. 1 is made of the titanium alloy material, so that the length of the hydraulic pump in the axial direction can be shortened, meanwhile, the oil distribution disc 102 and the positioning pin 5 are not needed, the number of assembly parts of the hydraulic pump is reduced, the assembly difficulty and the workload are reduced, and adverse effects on the performance of the hydraulic pump due to the processing and the assembly quality are avoided. In addition, the oil distribution disc 102 is generally thinner, two working surfaces of the oil distribution disc 102 are deformed to a certain extent after nitriding treatment, and during operation, internal leakage can occur between the oil distribution cover main body 101 and the working surfaces of the oil distribution disc 102, and the oil distribution cover in the embodiment can directly form a friction pair with the rotor 3 due to the omission of the oil distribution disc 102, so that the processing requirement on the working surfaces of the oil distribution cover is greatly reduced, the defect that a thin-wall part is deformed is avoided, and the problem of internal leakage is avoided.
Referring to fig. 1 and 4, as a preferred embodiment of the present example, the oil distribution cover base portion 11 includes a boss portion 111, the boss portion 111 being for connection with the housing 2; the friction pair mating portion 12 is connected to the surface of the boss portion 111. The cross section of the boss portion 111 is circular. So that the oil distributing cover 1 and the shell 2 are arranged and positioned.
Referring to fig. 1 and 4, in one embodiment, a groove 112 is formed in the outer peripheral wall of the boss portion 111 so as to extend in the circumferential direction thereof, and a seal ring 4 is fitted into the groove 112.
The oil distributing cover is provided with a high-pressure window 6, a low-pressure window 7, an oil inlet 8 and an oil outlet 9; the oil inlet 8 and the oil outlet 9 are arranged on the oil distributing cover body part 1; the high-pressure window 6 penetrates through the friction pair pairing part 2 and penetrates through the oil distributing cover base body part 1 to be communicated with the oil outlet 9; the low-pressure window 7 penetrates through the friction pair pairing part 2 and penetrates through the oil distributing cover base body part 1 to be communicated with the oil inlet 8. The high-pressure window 6 and the low-pressure window 7 are used for distributing oil in an oil suction area and an oil discharge area when the rotor works, and the oil inlet 8 and the oil outlet 9 are used for connecting the hydraulic pump with a high-pressure oil way and a low-pressure oil way of the system.
Referring to fig. 4, the oil separating cover 1 of the bimetal oil separating cover is fastened and installed with the shell 2 by adopting a screw, the sealing ring 4 seals the oil separating cover 1 with the shell 2, the leakage of the oil in the hydraulic pump cavity is prevented, and the oil separating cover 1 directly forms a friction pair with the rotor 3.
The bimetal oil separating cover of the embodiment can solve the heavy weight problem of the integral oil separating cover processed by the nitriding steel, the wall surface is low in strength of the aluminum split oil separating cover, the inner leakage and the axial length are long due to the split type oil separating cover, and the hydraulic pump using the bimetal oil separating cover of the embodiment can be suitable for high-pressure use occasions, improves the comprehensive efficiency of the hydraulic pump, and has the advantages of high strength, light weight, good economy and the like.
It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.
Claims (6)
1. The bimetal oil distributing cover is characterized by comprising an oil distributing cover base body part and a friction pair pairing part used for being in pairing connection with a rotor friction pair, wherein the friction pair pairing part is fixedly connected with the oil distributing cover base body part; the oil distributing cover base body part is made of alloy materials;
the friction pair pairing part is made of a high-strength wear-resistant metal material;
The alloy material is a titanium alloy material;
the friction pair pairing part is connected with the oil distributing cover base body part through hot isostatic pressure diffusion welding.
2. The oil distribution cover according to claim 1, wherein the oil distribution cover base portion includes a boss portion for connection with the housing; the friction pair mating part is connected to the table top of the boss part.
3. The oil distribution cover according to claim 1, wherein the high-strength wear-resistant metal material is a nitrided steel material.
4. The oil distributing cover according to claim 2, wherein the outer peripheral wall of the boss portion is provided with a groove extending along the circumferential direction thereof, and a seal ring is fitted in the groove.
5. The oil distribution cover according to claim 2, wherein the boss portion has a circular cross section.
6. The oil distributing cover according to any one of claims 1 to 5, wherein a high-pressure window, a low-pressure window, an oil inlet and an oil outlet are arranged on the oil distributing cover; the oil inlet and the oil outlet are arranged on the oil distributing cover body part; the high-pressure window penetrates through the friction pair pairing part and the oil distributing cover base body part to be communicated with the oil outlet; the low-pressure window penetrates through the friction pair pairing part and the oil distributing cover base body part to be communicated with the oil inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110734505.0A CN113464511B (en) | 2021-06-30 | 2021-06-30 | Bimetal oil distributing cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110734505.0A CN113464511B (en) | 2021-06-30 | 2021-06-30 | Bimetal oil distributing cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113464511A CN113464511A (en) | 2021-10-01 |
| CN113464511B true CN113464511B (en) | 2024-06-11 |
Family
ID=77874258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110734505.0A Active CN113464511B (en) | 2021-06-30 | 2021-06-30 | Bimetal oil distributing cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113464511B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775573A (en) * | 2010-03-05 | 2010-07-14 | 中航力源液压股份有限公司 | Surface strengthening treatment process for oil distribution cover of plunger pump |
| CN102953968A (en) * | 2011-08-31 | 2013-03-06 | 天津市泽华源泵业科技发展有限公司 | Disc flow distribution variable displacement radial piston pump bimetal composite rotor |
| CN103075316A (en) * | 2012-12-24 | 2013-05-01 | 北京工业大学 | Semiaxis type pure-water hydraulic axial plunger pump supported by bearings in cylinder |
| CN103104477A (en) * | 2013-01-22 | 2013-05-15 | 北京工业大学 | Asymmetric valve plate for fixed pure water hydraulic axial plunger pump |
| CN203488357U (en) * | 2013-09-10 | 2014-03-19 | 南京金城液压工程有限公司 | Titanium alloy hydraulic plunger pump or motor |
| CN103758746A (en) * | 2014-01-17 | 2014-04-30 | 钢铁研究总院 | Steel-steel double-metal rotor and manufacturing method thereof |
| CN205315254U (en) * | 2015-12-09 | 2016-06-15 | 济南中德重工科技有限公司 | Friction of plunger pump valve plate is vice |
| CN206175148U (en) * | 2016-11-01 | 2017-05-17 | 中航力源液压股份有限公司 | High rotational speed hydraulic piston pump cylinder body is vice with novel friction of valve plate |
| CN108247063A (en) * | 2018-01-29 | 2018-07-06 | 北京汇越新材料科技有限公司 | A kind of composite bimetal pipe material preparation method based on heat and other static pressuring processes |
| CN108953138A (en) * | 2018-09-18 | 2018-12-07 | 杭州力龙液压有限公司 | Hydraulic planger pump and hydraulic device |
| CN110985369A (en) * | 2018-10-03 | 2020-04-10 | 株式会社堀内机械 | Valve plate and hydraulic rotating device |
| CN111102185A (en) * | 2019-11-26 | 2020-05-05 | 中船重工重庆液压机电有限公司 | Bimetallic cylinder body, friction pair and processing method for axial variable plunger pump |
| CN112746276A (en) * | 2020-12-30 | 2021-05-04 | 浙江师范大学 | Valve plate preparation method and valve plate |
-
2021
- 2021-06-30 CN CN202110734505.0A patent/CN113464511B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775573A (en) * | 2010-03-05 | 2010-07-14 | 中航力源液压股份有限公司 | Surface strengthening treatment process for oil distribution cover of plunger pump |
| CN102953968A (en) * | 2011-08-31 | 2013-03-06 | 天津市泽华源泵业科技发展有限公司 | Disc flow distribution variable displacement radial piston pump bimetal composite rotor |
| CN103075316A (en) * | 2012-12-24 | 2013-05-01 | 北京工业大学 | Semiaxis type pure-water hydraulic axial plunger pump supported by bearings in cylinder |
| CN103104477A (en) * | 2013-01-22 | 2013-05-15 | 北京工业大学 | Asymmetric valve plate for fixed pure water hydraulic axial plunger pump |
| CN203488357U (en) * | 2013-09-10 | 2014-03-19 | 南京金城液压工程有限公司 | Titanium alloy hydraulic plunger pump or motor |
| CN103758746A (en) * | 2014-01-17 | 2014-04-30 | 钢铁研究总院 | Steel-steel double-metal rotor and manufacturing method thereof |
| CN205315254U (en) * | 2015-12-09 | 2016-06-15 | 济南中德重工科技有限公司 | Friction of plunger pump valve plate is vice |
| CN206175148U (en) * | 2016-11-01 | 2017-05-17 | 中航力源液压股份有限公司 | High rotational speed hydraulic piston pump cylinder body is vice with novel friction of valve plate |
| CN108247063A (en) * | 2018-01-29 | 2018-07-06 | 北京汇越新材料科技有限公司 | A kind of composite bimetal pipe material preparation method based on heat and other static pressuring processes |
| CN108953138A (en) * | 2018-09-18 | 2018-12-07 | 杭州力龙液压有限公司 | Hydraulic planger pump and hydraulic device |
| CN110985369A (en) * | 2018-10-03 | 2020-04-10 | 株式会社堀内机械 | Valve plate and hydraulic rotating device |
| CN111102185A (en) * | 2019-11-26 | 2020-05-05 | 中船重工重庆液压机电有限公司 | Bimetallic cylinder body, friction pair and processing method for axial variable plunger pump |
| CN112746276A (en) * | 2020-12-30 | 2021-05-04 | 浙江师范大学 | Valve plate preparation method and valve plate |
Non-Patent Citations (3)
| Title |
|---|
| 某型液压泵分油盖破裂分析与改进;谯维智;杨光武;;液压气动与密封;20200615(第06期);全文 * |
| 某型高压燃油泵的设计研究;柳荫;中国优秀硕士学位论文全文数据库 (工程科技Ⅱ辑);20181130;正文第4.1.2节 * |
| 轴向柱塞泵缸体和配油盘材料选用情况简介;陈柏枫;;煤矿机械;19820831(第04期);正文第2节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113464511A (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7651324B2 (en) | Diaphragm pump | |
| US8887621B2 (en) | Reciprocating compressor | |
| JP5477614B2 (en) | Valve structure | |
| US5564916A (en) | Rotary compressor having strengthened partition and shaped recesses for receiving the strengthened partition | |
| EP1555437A1 (en) | Compressor | |
| KR930006370B1 (en) | Piston ring for compressor | |
| US10309383B2 (en) | Bearing arrangement for a reciprocating compressor | |
| JPH01203668A (en) | Compressor valve gear | |
| US20110232416A1 (en) | Anti-abrasion device and reciprocating compressor having the same | |
| US4515513A (en) | Rotary compressor with inner and outer cylinders and axial insert type discharge valves | |
| EP2551563B1 (en) | Rotating-shaft seal | |
| US10087934B2 (en) | Vane compressor | |
| CN113464511B (en) | Bimetal oil distributing cover | |
| JPS631030Y2 (en) | ||
| JP2002031233A (en) | Hollow piston | |
| JP2009257206A (en) | Rotary compressor | |
| EP1236896B1 (en) | Compressor piston | |
| JPH10153170A (en) | Piston of swash plate compressor | |
| CN212563569U (en) | Weight reduction piston and compressor | |
| CN109424515A (en) | A kind of compressor and its manufacturing method | |
| JP2000009025A (en) | Plunger assembly in axial plunger type hydraulic unit | |
| RU190440U1 (en) | Compressor stage cylinder | |
| WO2018047947A1 (en) | Seal ring and supercharger | |
| EP3699428B1 (en) | Air compressor cylinder, air compressor, vehicle seat, and vehicle | |
| CN216077504U (en) | Closed compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |