JP3051835B2 - Lubrication oil pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lubricating oil pump for an engine or a compressor.

[0002]

[Prior art and problems] (T) of Joseph Vogel AG
Type lubricating oil pump) DKS 1-900-00 (92.
09), lubricating oil pumps are used to lubricate cylinders in medium or large diesel engines or compressors. The pump mechanism (pump element) is located in the housing and is arranged axially parallel to the drive shaft. One or two pressure ducts lead from the pump mechanism to a pressure outlet in the housing cover. Lubricating oil is supplied into the housing via a pressurized or unpressurized tube system. Usually, a number of housings are arranged one after the other and assigned to a common drive. Each housing has an inlet hole connected via a path to a source. In the event of a damaged or repaired cylinder of the engine to be lubricated, the cylinder must be supplied with a special commissioning oil during the run-in operation. The other cylinders are still supplied with standard oil during that time. Changing the oil for test operation or changing the oil for test operation to standard oil in the lubrication pump requires a very time-consuming and difficult tube system change. Further, it is very difficult to satisfy the lubrication performance required for modern medium- and large-sized engines, so that the performance and the basic principle of the known oil pump are limited.

[0003] The lubrication pump disclosed in CH-A-243901 is provided with a common drive source having a plurality of housings including a pump mechanism and housings interconnected by fastening bolts extending forward and backward.

[0004] The lubricating oil and fuel supply system disclosed in GB-A-748451 in connection with a diesel engine that can be operated selectively with a light type of heavy oil,
Separate pumps are required for each oil and complicated tubing systems with the possibility of selective switching are incorporated.

[0005] In the lubrication system disclosed in FR-A-676243, a washing or filtering device for the lubricating oil is incorporated in the lubrication path, which is selectively separated with the aid of a multi-way valve.

[0006] In the lubricating device disclosed in GB-A-465926, the plurality of reservoirs supply different types of lubricating oil that are selectively delivered to the lubrication site.
The regulating valve means makes each required flow path connection and shuts off unnecessary flow path connections. The feeding of the lubricating oil to the lubrication site is performed continuously.

The object of the present invention is to change the operating conditions, ie the standard oil and the test oil, in a compact design, simple, inexpensive from a manufacturing point of view and without any technical effort in a quick way. To provide a lubricating oil pump of the type described above.

[0008]

According to a first aspect of the present invention, at least one piston pump mechanism (E) and a pump shaft (1 ', 1'') for operating the at least one piston pump mechanism (E) are provided. 1 ''') and at least one piston at least one lubrication port (12)
And at least one housing (G) having an outlet path (23 ) through which oil discharged from the pumping mechanism (E) is supplied , and a housing that can be connected to the housing (G) in series. A multi-cylinder engine or compressor, in particular a two-stroke engine, comprising a housing (G) having the structure of (a), wherein a plurality of housings (G) are connected in series. , Each housing (G) is provided with a flow duct (3 ′, 3 ″,
3 ''') and flow ducts (3', 3 '',
3 ″ ′), a branch flow duct (4) for supplying oil to the piston pump mechanism (E) branching from the independent flow duct (5) for supplying oil to the piston pump mechanism (E), and a series. The said flow duct (3 ', 3 ", 3'") and the branch flow duct (4) which are in fluid communication
Said housing common source to distribute the oil (G) and (T1, C), said at least one housing with a piston pump mechanism (E) of the (G) Germany by
A separate supply source (T2) for supplying oil to the vertical flow duct (5) , and the branch flow duct (4) so as to select the common supply source (T1, C) and the separate supply source (T2). ) And a separate source (T)
And 2) a control means (U) provided on the side.

A second aspect of the present invention relates to the lubricating oil pump.
A continuous oil in said housing (G) forming (P)
Flows communicating with each other to form a supply path (3)
Duct (3 ', 3'',3''') and the branch flow
Via the duct (4), the flow duct (3 ′ or
Is each piste connected to 3 '' or 3 ''')
Pump mechanism (E) and the branch flow duct (4)
A control means (D) provided and selectively operated;
Connect another supply source (T2) to the piston pump mechanism (E).
Independent flow duct (5) connected via connection (A)
And each housing (G) comprising:

According to a third aspect of the present invention, the connecting portion (A) is
Separate supply source for supplying oil to the housing (G)
(T2) or oil consumption measuring device (7)
Connected .

According to a fourth aspect of the present invention, the connection portion (A) is provided with the individual
Control means (U) for controlling the supply to another supply source (T2)
Can be installed .

In a fifth aspect of the present invention, the flow duct (3 ′ is also
Or 3 '' or 3 ''') and the branch flow duct
(4), the independent flow duct (5), and the piston port
From the pump mechanism (E) to the outside of the housing (G).
The mouth channel (23) is formed as an internal flow duct,
Each control means (D) is mounted on the branch flow duct (4).
It is .

According to a sixth aspect of the present invention, the housing (G) is provided at the front.
The pump shaft (1 ', 1'',1''')
At least two for mounting the pumping mechanism (E).
A cubic shape having two receiving openings (19),
The receiving opening (19) is perpendicular to the center of rotation of the pump shaft.
90 ° or 180 ° to the direction or the vertical
° are provided at intervals .

In a seventh aspect, the housing (G) is
Each outlet path (23) was provided on the outer surface of the housing
Two housing sides connected to lubrication port (12)
A pair of adjacent receiving openings (19) and the housing
Lubrication port (12) is provided with the control means (D)
It is provided on the side of the housing .

An eighth aspect of the present invention relates to each piston pump mechanism.
(E) includes a drive source (B) provided outside .

According to a ninth aspect, a shaft of the housing (G) is provided.
A fastening screw (15) having substantially the same length as the directional length;
A housing having a screw portion (14) into which the fastening screw is screwed.
(G) and the thread portion of the fastening screw (15) penetrates,
Fix the head of the fastening screw (15) inside the housing (G)
And the head of the fastening screw (15) is fixed.
A hole provided with a female screw (18) on the inner peripheral surface of the step portion
(G) provided with a fastening screw (1)
5) is provided with a female screw to be screwed therein, and the housing
Into the female screw (18) provided on the inner peripheral surface of the step
A screw bush provided with a male screw to be provided.
Are connected in series .

According to a tenth aspect, there is provided a two-pair piston pump machine.
The housing (G) having the structure (E) has a predetermined lubricating surface.
Or lubricate at least one of the cylinder outlet valves
For the two cylinders (Z1 to Z6) of the engine to be
Pump module of the lubricating oil pump (P)
(M) is formed .

In an eleventh aspect, the housing (G) is
At least for introducing a heating medium or heating element
One heating duct (29) is provided .

In a twelfth aspect, the driving source (B) is configured such that the eccentricity is
Negative pump with frequency converter connected to pump shaft (1 ')
It is configured as a load-sensitive three-phase motor (BM, BG)
You.

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

Operation and effect of the present invention Supply oil to all housings
Lubricating oil pumps
Complex tubing systems for individual sources of construction
Become useless . The housing is common to all pump mechanisms.
Mutually coupled to receive lubricating oil from a source . For example, if a change to commissioning oil or another type of oil is required for the housing of an oil-lubricated pump, such a change can be made at any time in a quick manner without changing or installing the tubing system It is. When the replaced housing pump mechanism is connected to a separate source after replacement, all other non-replaced housing pump mechanisms are also supplied from the common source. Each housing can be assembled with each other
Formed of a compact block , which as a whole results in a compact and substantially strong lubricating oil pump structure . Further, it is possible to realize a driving principle of an efficient lubricating oil pump capable of satisfying the highest lubrication performance.

According to the invention, it is possible, for example, to separate the housing from which the standard oil is replaced by the test oil, so that different types of oil and test oil can be used without compromising the proper supply to the other housings. Of oil can be supplied individually. Replacement of the tube system is not required, but the shutoff must be activated. Other connections may be permanently or selectively connected to the commissioning oil source. Openings that open to the outside of the housing allow for easy assembly of each pump mechanism. Furoda of the opening the housing
No special duct connection is required during the replacement operation because it intersects the duct .

The oil supply for the test run and / or the consumption measuring device is connected to another connection of the housing. In such a case, the pump mechanism of this housing is supplied with a different type of oil from the pump mechanism of the other housing of the lubrication pump. And the oil consumption of the pumping mechanism of the housing is measured without impairing the lubricating function of the other lubricating housing. For example, the consumption of test run oil is easily measured in this way. It is clear that the standard oil is supplied via another connection for measuring such oil consumption. This is accomplished individually within each housing.

On the other hand, the other connection is designed as a receiving hole for another blocking device. For example, a commissioning oil supply is permanently connected to this connection. In the case of an oil change, only two shut-off devices are activated and no change in the interior of the housing is required.

[0031] Structural simplicity is achieved in that the flow duct is formed as a hole during the manufacture of the housing. hole
Are better than tubes when the oil pressure is high, and are provided with shut-off devices that shut off the housing from a common supply, which saves construction space.

The pump mechanism is effectively driven directly by an eccentric shaft supported inside the housing. The structure on the block is advantageous in manufacturing. The opening , the flow duct and the hole in the eccentric shaft are manufactured by a series of manufacturing methods in the current manufacturing plant. Only one pump mechanism from the housing side, or some that can serve as many lubrication ports as possible, is incorporated into the housing. The lubricating oil pump consisting of a large number of housings is compact and forms an anti-vibration structure unit.
Obtain the very compact and stable structural shape described above .

[0033] Preferably, a housing is provided for each lubrication port.
With pump mechanism subjected to preparative has four pump mechanisms in a single housing. All lubrication ports and the controls of the shut-off device are located on the same side of the housing for operational convenience.

According to the invention, the flow is easily adjusted individually from each lubricated connection without intervention into the interior of the housing. Its structure allows a reliable test method of the lubrication function. All components are integrated into the housing or are arranged on the housing in an unambiguous manner. The reliability of the operation is very high, at least because of the double checks.

All the housings of the lubricating oil pump are inspected mainly for failures in case of overpressure. The inspection function is performed in a structurally simple manner by a rupture element in the other pump mechanism that can still operate in case of failure of the pump mechanism (an important emergency function).

[0036] Impurities in the standard oil are removed by one filtration filter at least before entering the lubricating oil pump.

Additional checking means are provided to further increase the reliability of the operation.

A space-saving and simple inspection can be performed while the lubricating oil pump is being assembled from a number of modules.

Each housing as a pump module is manufactured in a modular construction which avoids having expensive tubes for oil supply or oil guiding, and is an independent structural unit combined with lubricating oil pumps of different sizes and performances Can be formed.

In order to meet special requirements, each housing is provided with at least one heating duct, which allows selective heating of all housings or only one housing. For this purpose, a steam heating or heating element is introduced. The heating duct part is preferably formed in such a way that the duct connection is achieved by connecting neighboring housings after the individual openings of the heating duct part in the housing wall are exposed.

Further, the lubricating oil pump can be equipped with a speed measuring device which is mounted on the last housing which is conveniently located away from the drive source for easy assembly work.

In addition, the load-dependent lubrication point supply is achieved when the speed or torque of the geared three-phase motor varies on the control side via a frequency converter. In the event of a failure of the frequency converter, the three-phase motor runs at a defined speed with some common main frequency (an important emergency function).

However, other useful drive sources can be used to jointly drive all the pump modules connected in a lubricating oil pump.

Preferably, each housing already contains electrical equipment, for example the cable harness is mounted in a cable duct of the housing. The cable harness may conveniently extend through all the interconnected housings during connection of the housings, via mating cable connectors. The supply current for electrical or electronic components is transmitted by cables or by signals or data created for inspection or control purposes.

[0045]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylinder lubrication system S for lubricating six cylinders Z1 to Z6 of a medium or large diesel engine or compressor, in particular a two-stroke marine diesel engine, comprises, as main components:
Lubricating oil pump P consisting of three pump modules M
And some Distributors matching the number of cylinders
Yuta W, and W', made from an oil supply source of T1, T2 (for the Standard Oil commissioning oil). Each pump module M has a block-shaped housing in which upper and lower lubrication surfaces of cylinders Z1 to Z6 and four piston pump mechanisms E for supplying oil to an outlet valve via a downstream distributor are arranged. Installed on G.

The eccentric shafts 1 ', 1 ", 1"' belonging to the drive path 1 leading to the common drive source B are held in respective housings. The eccentric shafts 1 ′, 1 ″, 1 ′ ″ directly drive each other's piston pump mechanisms and are mutually connected via coupling means K. The housing G is connected to the connection 2 in a series of ways. Flow of each housing G
The ducts 3 ', 3 ", 3"' are made continuous by coupling the housings G to one another, and are connected to a continuous oil supply connected to a common supply C (eg a tank T1 for standard oil). It is provided as a part of the path 3 .
Fine filter F (preferable mesh diameter is about 100
μm) is the shut-off device D upstream of the first housing or
It is provided in connection with the flow duct 3 ″ ″.

All piston pump mechanisms E in the housing
The branch flow duct 4 that is connected to each of the flow ducts 3 ′ of the housing G (ie, the flow ducts 3 ′, 3 ′)
, 3 '''). Blocking device D Haujin
Provided in the branch flow duct 4 in the housing .

Furthermore, each housing G has a connection A which is connected to the piston pump mechanism E of the housing G via an independent flow duct 5. Tank T2 (for commissioning oil or other types of oil or standard oil) can be connected to connection A, and shutoff U is connected to connection
A may be provided.

Oil consumption measurement as indicated by the dashed line
The device 7 may be provided at the connection A in a flow duct 6 (optionally in the housing G) or a flow duct 8 (optionally in the housing G) connecting the tank 2 to the continuous oil supply path 3 . The tanks T2 may optionally be connected to each other's housings G. However, it is also possible to connect a large number of housings G to the tank T2 at the same time. All pump modules of lubricating oil pump P are tank T
In the case where the oil is supplied by the type 2 oil, the shutoff device is closed at the fine filter F, and the oil is supplied to the continuous oil supply path 3.
It is expedient to introduce the test run oil via the flow duct 8. It may be introduced from the drive source B side or from the fine filter F side.

The measuring device H for measuring the oil level or filter clogging is provided at least in one of the housings G. Further, the lubricating oil pump P conveniently passes through all housings common to all housings G. Pressurization
A pressure control device J connected to the path 9 may be provided. The pressurized impact valve 13 may be provided in the pressurizing path 9 of at least one housing G.

As schematically illustrated in FIG. 2, the pump mechanism can adjust each flow rate individually (as indicated by the slanted arrows). The optical flow control device N is arranged together with the visible tube 10 and the float 11 in each outlet path 23 leading to the lubrication port 12 . An electrical flow control device O, for example a proximity switch that is sensitive to the movement of the float 11, is arranged at least in one of the optical flow control devices N. Electrical
The flow control device O is connected to a signal or alarm device via a cable harness (covered thin harness) passing through all the housings G. Furthermore, each outlet path 23 is protected by a check valve R which closes in the counterflow direction to the piston pump mechanism E. Furthermore, each outlet path 23 is electrically connected via a mechanical leak valve L.
The housing G together with the pressure channels 9 ′ of all the housings forming the pressure path 9 to which the pressure control device J is connected
Is connected to the pressurizing path 9 passing through.

The block diagrams of FIGS. 1 and 2 are different from each other in detail, in order to show the structure and equipment of the individual pump modules in the figures. 3 and 4 clarify some details.

As shown in FIGS. 3 and 4 (partial front view and partial plan view of a lubricating oil pump P having three pump modules M), a drive source B, for example, a combined frequency converter (not shown) Motors BM with the eccentric shafts 1, 1 ', 1' which are flanged together with the transmission BG on the first one housing side of the three housings G and which are connected to each other via a coupling K ', 1''' are driven. Fixie
The pumping mechanism E is inserted into an opening 19 formed in the block-shaped housing G. They protrude from the side of the housing and allow operation of the flow regulator V from outside, for example via the operating handle 21. The oil level and / or filter clogging measuring device H is held on the upper surface of the housing, and the driving device 22 of the shutoff device D inserted into the branch flow duct 4 is held in the next housing.

The piston pump mechanisms E are arranged axially side by side in pairs, ie two pump modules are arranged on the top of the housing and two on the front of the housing. To that end, each pump module also has four lubrication ports which are preferably held on the top of the housing.
And 12 . If not used, the oil drain screw 26
May be closed. For example, each other connection part A is installed in an independent flow duct 5 connected to the piston pump mechanism E and the internal chamber of the housing of the eccentric shaft parts 1 ', 1 ", 1"'.

[0055] Two pump mechanisms are provided in the third housing. On the other hand, the unused opening 19 is covered by the cover 24. As shown in the front view of the second housing of FIG. 3, the lubricating port to the outlet passage 23 leading to the flow ducts
Port 12 is inserted. The leak valve L is inserted into the outlet path 23 and is connected to the pressurizing path 9 for transmitting a pressurizing signal to the pressurizing control device J in the event of a rupture of the leak valve resulting in a rupture.

Furthermore, each housing faces away from the actuating element, for example a visible tube 10 (FIG. 3 FIG. 3), such as the front of the housing for each outlet path 23, the optical flow control device N on the side of the housing. (As shown in the third housing) and then integrated with the aforementioned optical flow control device N and electric flow control device O, which may be provided in one visual tube, if desired, in each visual tube. Is done. The electrical flow control device O is fixedly attached to the cable duct 31 of the housing G and is connected to a cable route of the neighboring housing G when the housings are connected to each other, preferably by a cable connector 32. . The cable path may be connected to an alarm or signaling device (not shown) of the lubricating oil pump P. Further, the eccentric shaft 1 ′,
An outlet opening 30 for 1 ″, 1 ′ ″ is formed in the housing G. The outlet opening 30 of the last housing G in the row may be covered by a cover 27 (FIG. 4).
However, it is also possible to hold the speed measuring device X in this part.

FIG. 4 shows how the lubrication ports 12 of the housing G are arranged side by side on the side of the housing where the operating element for the shut-off device D is located. If the first housing G, having a second housing flow ducts 3 of '' the third flow duct housing (not shown)
The flow duct 3 'forming the continuous oil supply path 34 can be connected to the common supply C at the last housing in the row. A centering bolt 25 at the center of each other's housing is provided between the second and third housings in FIG. Each housing G is a heating duct section and can be connected to a heating path (for example for steam heating) or it is possible to insert a heating element such as a heating rod.
A heating duct part 29 is included. The heating duct portion 29 of the housing G of the lubricating oil pump may be connected to the center of all the housings for heating. Also, for at least one heating element to accomplish an individual heating operation,
It is inserted into each housing G or only the selected housing G. Optical oil level control (inspection mirror 28 in FIG. 4) may be additionally provided.

The second housing G is viewed in a row in FIG.
Is connected to the first housing G by a fastening screw 15 which tightens the threaded hole 14 in the first housing and holds the screw head at the shoulder of the hole in the second housing. The third housing is held with a screw head at the shoulder of the hole and the enlarged housing 17 of the second housing G
It is connected to the second housing by a fastening screw 15 screwed into the female thread of a sleeve 18 threaded behind the head 16 of the fastening screw 1 before being screwed into the second housing. The individual rear housing is securely attached to the front housing, in which case the fastening screw 1 of the optimum length (the length of the aforementioned screw approximately matching the length of the housing)
5, the required number of housings can be arranged in a line and in sequence.

Despite being a component that can be adjusted from the outside, each pump module M has a very compact lubricating oil pump P and a compact design with no pressure leakage. The lubricating oil pump P has a sufficient inherent stiffness, thanks to the compact block-shaped housing and the connection 2 with excellent added capacity and the flat connection on the housing side of the interconnected housing. Thus, the pump does not require expensive substrates or stiffeners and has a particularly important vibration resistance when starting and stopping the drive source. Only the method in which each housing G has four openings of four pump mechanisms as an example is described.
It is possible to couple another pair of pump mechanisms E from the other housing side to the same eccentric shaft. In addition, three adjacent pumping mechanisms can be provided on each housing side, or the housing can be smaller and more compact, with pumps having only one or two individual pumping mechanisms. It is also possible to attach. Thanks to its inherent stiffness and compact design, the lubricating oil pump can be a pump carrier or a lubricated engine, or a carrier plate 33 as shown in FIG. Can be directly attached to

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a cylinder lubrication system with a lubrication oil pump for the cylinder.

FIG. 2 is a detailed sectional view of a pump module.

FIG. 3 is a partial front sectional view of a lubricating oil pump having three pump modules for a total of six engine cylinders.

FIG. 4 is a partial plan sectional view of the lubrication pump.

FIG. 5 is a detailed sectional view related to connection of a pump module.

[Explanation of symbols]

D Shut-off device E Piston pump mechanism G Housing P Lubricating oil pump 1 Pump shaft 3 Continuous oil supply path 12 Lubrication port 23 Exit path

Claims (12)

(57) [Claims] At least one piston pump mechanism (E), a pump shaft (1 ′, 1 ″, 1 ′ ″) for operating the at least one piston pump mechanism (E), Oil discharged from at least one piston pump mechanism (E) connected to the two lubrication ports (12).
An outlet path (23) to which the il is supplied , at least one housing (G) arranged with: and another housing (G) having a similar structure that can be connected in series to said housing (G). A lubricating oil pump (P) for a multi-cylinder engine or compressor, in particular a two-stroke engine, comprising a plurality of housings (G) connected in series, each housing (G) being interconnected between the housings. Flow duct (3 ', 3 ", 3"') for supplying oil by communicating with the oil pump, and a piston pump mechanism (E) branched from the flow duct (3 ', 3 ", 3"") A branch flow duct (4) for supplying oil to the pump, an independent flow duct (5) for supplying oil to the piston pump mechanism (E), and the flow ducts (3 ′, 3 ″,
3 ″ ′) and a common supply (T1, T2) that distributes oil to the housing (G) by means of a branch flow duct (4).
C), a separate supply (T2) for supplying oil to an independent flow duct (5) of at least one housing (G) with said piston pump mechanism (E), and said common supply (T1, C) and individual sources (T2)
A control means (D) provided on the branch flow duct (4) and a control means (U) provided on the individual supply source (T2) side so as to select the lubricating oil pump. . 2. Before forming the lubricating oil pump (P).
The continuous oil supply path (3) in the housing (G)
Forming said flow ducts communicating with each other (3 ',
3 ″, 3 ″ ′) and the flow duct via the branch flow duct (4).
(3 'or 3''or3''')
Provided in each of the piston pump mechanisms (E) and the branch flow duct (4) and selectively operated.
Control means (D), the individual supply source (T2) and the piston pump mechanism (E)
Independent flow duct that connects to the unit via a connection (A)
(5), each housing (G) comprising
The lubricating oil pump according to claim 1, wherein 3. The connection part (A) has a housing.
A separate source (T2) for supplying oil to (G) or
The oil consumption measurement device (7) is selectively connected
The lubricating oil pump according to claim 2, wherein: 4. The connection (A) is connected to the individual source (T).
2) a control means (U) for controlling the supply to
3. The lubricating oil pump according to claim 2, wherein: 5. The flow duct (3 ′ or 3 ″ also)
Or 3 ''') and the branch flow duct (4)
Flow duct (5) and the piston pump mechanism (E)
Said exit path (23) from the housing to the outside of the housing (G)
Are formed as internal flow ducts and each control means
(D) is to be attached to the branch flow duct (4).
3. The lubricating oil pump according to claim 2, wherein: 6. The pump according to claim 6, wherein said housing (G) is provided with said pump shaft.
(1 ', 1'',1'''), piston pump machine
At least two receiving openings each for mounting the frame (E)
A cubic shape having a mouth (19),
The mouth (19) can be vertical or through the center of rotation of the pump shaft
Are set at 90 ° or 180 ° intervals to the vertical direction.
3. The lubricating oil pump according to claim 2, wherein the lubricating oil pump is driven. 7. The housing (G) has a respective outlet path.
(23) is a lubrication port (1) provided on the outer surface of the housing.
2) Connect two adjacent side surfaces of the two housings
Receiving opening (19) and a lubricating port of the housing
(12) is a side surface of the housing provided with the control means (D).
3. The lubricating oil pump according to claim 2, wherein the lubricating oil pump is provided on the lubricating oil pump. 8. Each piston pump mechanism (E) is provided externally.
Claims: A drive source (B) is provided.
Item 2. A lubricating oil pump according to Item 1 . 9. An axial length of the housing (G) is substantially the same.
A housing having a fastening screw (15) having a length and a screw portion (14) into which the fastening screw is screwed.
(G) and the thread portion of the fastening screw (15) penetrate therethrough, and the fastening screw (1) is formed.
Step 5) to fix the head of 5) inside the housing (G)
Of the step portion to which the head of the fastening screw (15) is fixed
Howe with a hole provided with a female screw (18) on the peripheral surface
Jing (G) and an inner thread provided with an internal thread into which a fastening screw (15) is screwed are provided.
The outer periphery is provided on the inner peripheral surface of the step portion of the housing.
Screw thread provided with a male screw to be screwed into the female screw (18)
And a plurality of housings (G) connected in series.
The lubricating oil pump according to claim 1, wherein: 10. It has two pairs of piston pump mechanisms (E).
The housing (G) has a predetermined lubrication surface or cylinder.
At least one of the outlet valves of the engine is lubricated
Said lubricating oil for two cylinders (Z1 to Z6)
Forming a pump module (M) of the pump (P)
The lubricating oil pump according to claim 1, wherein: 11. The housing (G) may include a heating medium or a heating medium.
Is at least one heating duct for introducing a heating element
2. The method according to claim 1, further comprising the step of:
The lubricating oil pump. 12. A drive source (B) for driving the eccentric pump shaft.
(1 '), load-sensitive type with frequency converter
Characterized as a three-phase motor (BM, BG)
The lubricating oil pump according to claim 1, wherein