Approfondir ses connaissances en hydraulique vol 3

55,00€ inc. tax 52,13€ excl. tax

Details

Promotion

3 livres pour se former en hydraulique. 55 cours associés à des vidéos consultables...

165,00€ 148,50€ inc. tax
156,40€ 140,76€ excl. tax

Details

Promotion

620,00€ 496,00€ inc. tax
516,67€ 413,33€ excl. tax

Details

Promo

55,00€ 49,50€ inc. tax
52,13€ 46,92€ excl. tax

Details

livre contrôle, réglage, dépannage minipelle

La procédure de contrôle, réglage et dépannage est décrite à l'aide d'un schéma de mini-pelle 1.6T....

55,00€ inc. tax 52,13€ excl. tax

Hydraulic training : The basics Vol 1

Véritable formation hydraulique : explications simples, comprises de tous. Véritable...

55,00€ inc. tax 52,13€ excl. tax

Details

hydraulic training by webcam

Formation individuelle en direct, flexible adaptée à votre niveau. ...

0,00€ inc. tax 0,00€ excl. tax

Details

Figure (A) shows a bidirectional flow restrictor. That is, the flow is reduced in both directions of passage.

Figure (B) shows a unidirectional flow restrictor. That is, the flow is reduced only in one direction. In the other direction, a part of the flow passes through the restriction and the other part through the non-return valve.

2- Flow regulator

The flow regulator keeps a constant flow regardless of the load of the receiver.

There are two types of flow regulator:

- 3-way flow regulator.

- 2-way flow regulator.

We can find ourselves two symbols:

- The detailed symbol (Fig. 1).

- The simplified symbol (Fig. 2).

Promotion

box for hydraulic coil test DIN EN 175 301-803-A (HIRSCHMANN GDM-séries)

Boitier test bobine hydraulique DIN EN 175 301-803-A (HIRSCHMANN GDM-séries) Boitier test bobine...

99,00€ 89,10€ inc. tax
82,50€ 74,25€ excl. tax

Details

Promotion

Formations de bases hydrauliques vol 1 3

Formation hydraulique "les bases" vol 1&2

Se former en hydraulique. 40 cours hydrauliques associés à 40 vidéos. Véritable...

110,00€ 99,00€ inc. tax
104,27€ 93,84€ excl. tax

Details

55,00€ inc. tax 52,13€ excl. tax

Details

Formation : les bases de l' hydraulique vol 2 (livre + vidéos)

55,00€ inc. tax 52,13€ excl. tax

Details

The diagram is representative of the mechanics. In the figure above, the pressure balance of the flow regulator consists of a spring (item 5) determined by the manufacturer which is between 2 and 10 bars. The spool (item 6) is normally open at rest. It will close when the pilot pressure (item 7) will counteract the spring force (item 5) which is added to the pressure of the load of the receiver brought by the pilot (item 8). A jet on the control pilot (item 8) makes it possible to stabilize the pressure balance.

The pressure balance works on the principle of pressure reduction. Its role will be to maintain a constant pressure difference across the restriction (item 9).

The restriction (item 9) is completely closed. The pump (item 1) driven by a heat engine (item 2) delivers a flow rate of 30l / min. The flow accumulates at the level of the restriction, the pilot pressure instantly reaches the displacement pressure of the spool (item 6) and closes the passage of the oil. The oil from the pump returns to the tank via the pressure relief valve (item 3).

We see a pressure of 200 bars in M1 and 5 bars in M2 (stand-by pressure).

4- Flow regulator: cylinder output

Hydraulic hotline

Résoudre vos problèmes hydrauliques rapidement HOTLINE (Réponse rapide) Résoudre...

1 320,00€ inc. tax 1 100,00€ excl. tax

Details

Promotion

Formation hydraulique de base niveau 1 complète en vidéo webcam enregistrée sur...

120,00€ 120,00€ inc. tax
113,74€ 113,74€ excl. tax

Details

When the restriction of the flow regulator is opened, the 5 stand-by bars return to the spring (item 5) and open the pressure balance. The cylinder leaves at a reduced speed under a pressure of 50 bars in M3. A flow of 10 l / min passes through the regulator, the excess flow (20 l / min) returns to the tank by the pressure relief valve (item 3) under 200 bars. The pressure balance reduces the pressure from 200 bars to 55 bars in M2. (50 bars of load + 5 bars of spring). It allows only the bit rate requested by the restriction.

There is a pressure difference (ΔP) of 5 bars across the restriction.

5- Flow regulator: cylinder output with load change

Formation : les bases de l hydraulique vol 2 Ebook

55,00€ inc. tax 52,13€ excl. tax

Details

Expertise: contrôle et réglage des pompes hydrauliquesExpertise pompe La pompe est un élément...

0,00€ inc. tax 0,00€ excl. tax

Details

During the output of the cylinder rod, the load increases from 50 to 100 bars. The pressure returned to the spring of the pressure balance (item 5) increases to 100 bars, which causes a slight movement of the spool (item 6) down. By adding slightly more oil at the restriction, the pressure rises to 105 bars in M2. The excess flow returns to the tank by the pressure relief valve (item 3) under 200 bars.

It can be seen that the pressure difference across the restriction is always 5 bars. The flow will remain unchanged and the cylinder will come out at the same speed.

6- Flow regulator: cylinder in mechanical stop